NEET Biology Breathing and Exchange of gases (Animal Respiration) Question Bank

done Self Evaluation Test - Breathing and Exchange of Gases Total Questions - 81

• question_answer1)
  Much developed larynx of human male is called:
  A)
  Aristole?s lantern                         done clear
  B)
  Syrinx done clear
  C)
  Adam's apple                             done clear
  D)
  Muller's organ done clear
  View Solution play_arrow

• question_answer2)
  Which of the following feature is common in the alveoli of lungs and villi of intestine in mammals?               
  A)
  Provide a large surface area. done clear
  B)
  Have ciliated epithelium. done clear
  C)
  Are suited for diffusion of gases. done clear
  D)
  Have rich supply of blood vessels and lymph ducts. done clear
  View Solution play_arrow

• question_answer3)
  Left lung of human has:
  A)
  2 lobes                                      done clear
  B)
  4 lobes done clear
  C)
  3 lobes           done clear
  D)
                     5 lobes done clear
  View Solution play_arrow

• question_answer4)
  The alveoli of the lungs do not contain "air" because:
  A)
  We normally do not ventilate our lungs at a high enough rate. done clear
  B)
  The lungs have too many alveoli to ventilate. done clear
  C)
  There is "dead space" in the trachea and bronchi. done clear
  D)
  The trachea and bronchi are too small in volume. done clear
  View Solution play_arrow

• question_answer5)
  The process of migration of chloride ions from plasma to RBC and carbonate ions from RBC to plasma is:
  A)
  Chloride shift   done clear
  B)
                     Ionic shift done clear
  C)
  Atomic shift      done clear
  D)
                     \[N{{a}^{+}}\] pump done clear
  View Solution play_arrow

• question_answer6)
  At rest, most people require an alveolar ventilation for about 4 L/minute. Suppose an emphysema victim with a tidal volume of 0.5 L has suffered alveolar damage that has produced a respiratory dead space of 0.3 L, what will be that person's frequency of breathing at rest?
  A)
  5 breaths/min     done clear
  B)
                     8 breaths/min done clear
  C)
  20 breaths/min    done clear
  D)
                     50 breaths/min done clear
  View Solution play_arrow

• question_answer7)
  A zoologist compared the respiratory efficiency and swimming speed of different fish. He found that less efficient fish tended to have:
  A)
   Greater ventilation     done clear
  B)
  A thicker respiratory surface done clear
  C)
  More haemoglobin done clear
  D)
  A faster heart rate done clear
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• question_answer8)
  Ciliated epithelium in trachea of mammals helps in:
  A)
  Sucking inspired air in. done clear
  B)
  Perceiving sense of smell. done clear
  C)
  Pushing expired air out. done clear
  D)
  Pushing mucus out. done clear
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• question_answer9)
  When, under certain conditions, the p50 value of haemoglobin rises, the affinity of the pigment of combining with \[{{O}_{2}}\]Will:
  A)
  Remain same done clear
  B)
  Rise done clear
  C)
  Fall done clear
  D)
  First rise and then fall done clear
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• question_answer10)
  Partial pressure of oxygen in inspired and expired air is ....... and ....... mm of Hg.
  A)
  100, 46                                     done clear
  B)
  158, 40 done clear
  C)
  158, 90          done clear
  D)
                     100, 95 done clear
  View Solution play_arrow

• question_answer11)
  The given diagram represents the human respiratory system with few structures labelled as 1, 2, 3 and 4.

  The exchange of gases takes place in which labelled structure?

  A)
  1: Trachea       done clear
  B)
                     2: Bronchi done clear
  C)
  3: Bronchioles                            done clear
  D)
  4: Alveoli done clear
  View Solution play_arrow

• question_answer12)
  Which of the following statement sequences is correct to initiate expiration?

  (i) Relaxation of external intercostal muscles and return of diaphragm and sternum to their normal position.

  (ii) Air expelled from lungs.

  (iii) Volume of thorax decreases.

  (iv) Intrapulmonary pressure increases.

  A)
   (i), (iii), (iv), (ii)   done clear
  B)
                     (ii), (iv), (iii), (i) done clear
  C)
   (iv), (iii), (ii), (i)   done clear
  D)
  (i),(ii), (iii), (iv) done clear
  View Solution play_arrow

• question_answer13)
  The graph shows four dissociation curves.

  Which curve represents the oxygen dissociation curve for myoglobin?

  A)
   I                   done clear
  B)
                     II done clear
  C)
  III                                             done clear
  D)
  IV done clear
  View Solution play_arrow

• question_answer14)
  The chloride shift in red blood cells is the movement of:              
  A)
  Cations into the cell to balance its uptake of chloride ions. done clear
  B)
  Chloride ions from the blood into the glomerular filtrate for excretion. done clear
  C)
  Chloride ions out of the cell to balance the release of hydrogen carbonate ions. done clear
  D)
  Chloride ions into the cell to balance its uptake of hydrogen carbonate ions. done clear
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• question_answer15)
  Which of the following statement correctly defines Bohr effect?
  A)
  Rise in p50 with a decrease in \[C{{O}_{2}}\] cone. done clear
  B)
  Rise in p50 with decrease in pH. done clear
  C)
  Rise in p50 with increase in \[{{O}_{2}}\] done clear
  D)
  Fall in p50 with decrease in pH.       done clear
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• question_answer16)
  Approximate amount of \[{{O}_{2}}\] in expired air is:
  A)
  16%                                          done clear
  B)
  4.6% done clear
  C)
  19%                                          done clear
  D)
  <1% done clear
  View Solution play_arrow

• question_answer17)
  R.Q. is less than 1 for:
  A)
  Starch            done clear
  B)
                     Organic acid done clear
  C)
  Protein           done clear
  D)
                     Carbohydrate done clear
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• question_answer18)
  The alveoli contain specialised cells that secreted phospholipoprotein complex known a pulmonary surfactant. The function of pulmonary surfactant is:            
  A)
  To provide some rigidity to the alveoli m prevent lung collapse. done clear
  B)
  To decrease the surface tension of the alveoli, making it easier to expand them done clear
  C)
  To facilitate the diffusion of \[{{O}_{2}}\] and \[C{{O}_{2}}\] by providing protein channels through which these gases flow. done clear
  D)
  To provide a sticky surface upon which dust and microbes are trapped and disposed of done clear
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• question_answer19)
  Because of the relatively high altitude of Antonito, Colorado, the town has a normal barometric pressure of about 600 mm He rather than 760 mm Hg as at sea level. The partial pressure of oxygen in Antonito's air is approximately:             
  A)
  75 mmHg       done clear
  B)
                     126 mmHg done clear
  C)
  160 mm Hg      done clear
  D)
                     760 mm Hg done clear
  View Solution play_arrow

• question_answer20)
  Smoking destroys the cilia in the respiratory passage ways. This:
  A)
  Makes it harder to move air in and out of the lungs. done clear
  B)
  Decreases the surface area for respiration. done clear
  C)
  Slows blood flow through lung blood vessels. done clear
  D)
  Makes it harder to keep the lungs clean. done clear
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• question_answer21)
  Breathing with the help of ribs is more  pronounced in:
  A)
  Males                                        done clear
  B)
  Females done clear
  C)
  Pregnant females                        done clear
  D)
  None of these done clear
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• question_answer22)
  The function of nasal cavity and nasopharynx is to:
  A)
  Warm the inspired air. done clear
  B)
  Moisten the inspired air. done clear
  C)
  Filter out the dust particles from the inspired air. done clear
  D)
  All of the above done clear
  View Solution play_arrow

• question_answer23)
  Switch off centre for breathing lies in:
  A)
  Medulla oblongata                      done clear
  B)
  Hypothalamus done clear
  C)
  Pons                                         done clear
  D)
  Carotid bodies done clear
  View Solution play_arrow

• question_answer24)
                                                  The tissue respiration refers to:
  A)
  Inspiration                                  done clear
  B)
  Expiration done clear
  C)
  External respiration                     done clear
  D)
  Internal respiration done clear
  View Solution play_arrow

• question_answer25)
  Total lungs capacity is approximately:
  A)
  1200ml         done clear
  B)
                     2400ml done clear
  C)
  4000ml                                      done clear
  D)
  5800ml done clear
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• question_answer26)
  Voice in mammal is produced:
  A)
  By syrinx                                   done clear
  B)
  during inhalation done clear
  C)
  By bronchus                               done clear
  D)
  during exhalation done clear
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• question_answer27)
  The vocal cords are attached to which of the following paired cartilage of larynx?
  A)
  Cricoid           done clear
  B)
                     Thyroid done clear
  C)
  Arytenoid                                   done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer28)
  Which of the following statements sequences is correct to initiate inspiration?

  (i) The contraction of external intercoastal muscles raises the ribs and sternum.

  (ii) Volume of thorax increases in the dorsoventral axis.

  (iii) Increase in pulmonary volume.

  (iv) Intrapulmonary pressure decreases.

  (v) Volume of thorax increases in the anterior- posterior axis.

  A)
  (i), (ii), (iv), (v), (iii) done clear
  B)
  (i), (ii), (iii), (iv), (v) done clear
  C)
  (i), (ii), (iv), (iii), (v) done clear
  D)
  (v), (i), (ii), (iii), (iv) done clear
  View Solution play_arrow

• question_answer29)
  The 'blue baby' syndrome results from:
  A)
  Methaemoglobin done clear
  B)
  Excess of dissolved oxygen done clear
  C)
  Excess of TDS (total dissolved solids) done clear
  D)
  Excess of chloride done clear
  View Solution play_arrow

• question_answer30)
  A person can hold his breath longer if he gradually exhales than if he keeps his lungs fully expanded. This phenomenon is due to the fact that:
  A)
  Concentration of \[C{{O}_{2}}\] in the blood decreases, lessening the excitatory input to the carotid bodies. done clear
  B)
  He is then using less \[{{O}_{2}}\] as his thoracic muscles are not working as hard. done clear
  C)
  Stretch receptors in his lungs are then not firing as much thus lessening the excitatory input to the expiratory centres. done clear
  D)
  He is preventing the pressure in his lung from increasing too much done clear
  View Solution play_arrow

• question_answer31)
  Hamburger phenomenon is also known as:
  A)
  Calcium shift     done clear
  B)
                     Bohr effect done clear
  C)
  Chloride shift     done clear
  D)
                     \[N{{a}^{+}}-{{K}^{+}}\]pump done clear
  View Solution play_arrow

• question_answer32)
  What would happen if human blood becomes acidic (low pH)?
  A)
  Oxygen-carying capacity of haemoglobin decreases. done clear
  B)
  Oxygen-carrying capacity of haemoglobin increases. done clear
  C)
  RBC count increases. done clear
  D)
  RBC count decreases. done clear
  View Solution play_arrow

• question_answer33)
  Amount of \[{{O}_{2}}\] normally carried by 100 mL of pure blood is:
  A)
  40 mL                                       done clear
  B)
  20 mL done clear
  C)
  10 mL                                       done clear
  D)
  30 mL done clear
  View Solution play_arrow

• question_answer34)
  Although much \[C{{O}_{2}}\] is carried in blood, yet blood does not become acidic, because:
  A)
  It is absorbed by the leucoc    done clear
  B)
  Blood buffers play an important role in \[C{{O}_{2}}\] transport. done clear
  C)
  It combines with water to form \[{{H}_{2}}C{{O}_{3}}\]which is neutralised by \[NaC{{O}_{3}}\]. done clear
  D)
  it is continuously diffused through tissues and is not allowed to accumulate. done clear
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• question_answer35)
  If the thoracic wall of the lungs is punctured then:
  A)
  The lungs get inflated. done clear
  B)
  The man dies as the lungs get collapsed. done clear
  C)
  The breathing rate decreases. done clear
  D)
  The breathing rate increases. done clear
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• question_answer36)
  The covering of lungs is called:
  A)
  Pleura            done clear
  B)
                     Pericardia done clear
  C)
  Peritoneum       done clear
  D)
                     Mediastinum done clear
  View Solution play_arrow

• question_answer37)
  Alveoli increase the surface area by:
  A)
  10\[{{m}^{2}}\]                      done clear
  B)
  100\[{{m}^{2}}\] done clear
  C)
  150\[{{m}^{2}}\]                     done clear
  D)
  200\[{{m}^{2}}\] done clear
  View Solution play_arrow

• question_answer38)
  he percentage of carbon dioxide, oxygen and nitrogen in exhaled air of man are about:
  A)
  0.04: 16:79        done clear
  B)
                     0.4:20:70 done clear
  C)
  4.0: 20: 79                                 done clear
  D)
  4.0: 16: 79 done clear
  View Solution play_arrow

• question_answer39)
  A biochemist mixed 10 drops of acid with 100 mL of water, and the pH dropped from 7.4 to 5.0. She, then mixed 10 drops of acid with 100 mL of blood. The pH dropped from 7.4 to 7.2. What is the reason for this difference?
  A)
  Blood is thicker than water. done clear
  B)
  Blood is already very acidic, so the acid has less effect. done clear
  C)
  Blood is saturated with oxygen; there is little room for acid. done clear
  D)
  Blood contains buffers that reduce pH change. done clear
  View Solution play_arrow

• question_answer40)
  Forced deep breathing for a few minutes by a person at rest may be followed by a temporary cessation of breathing, because of:
  A)
  Too much \[{{O}_{2}}\] in blood.  done clear
  B)
  Too much \[C{{O}_{2}}\] in blood,  done clear
  C)
  Little \[C{{O}_{2}}\] in blood.         done clear
  D)
  Both too much \[{{O}_{2}}\] and very little \[C{{O}_{2}}\] in blood. done clear
  View Solution play_arrow

• question_answer41)
  In the given figure, label A represents_____ while label B represents ______.                         
  A)
  A- Trachea,    B- Bronchus              done clear
  B)
  A- Alveolus,    B- Bronchiole done clear
  C)
  A- Bronchiole, B- Trachea done clear
  D)
  A- Trachea,     B- Bronchiole done clear
  View Solution play_arrow

• question_answer42)
  Patients with chronic lung disease and difficulty breathing often adapt to the high concentration of \[C{{O}_{2}}\] in their blood. The breathing centres stop responding to \[C{{O}_{2}}\] level. If such a patient has difficulty in breathing, medical personnel are reluctant to give the patient pure oxygen. Based on what you know about control of breathing why do you think this is the case?
  A)
  The patient's body would use the oxygen to make even more\[C{{O}_{2}}\]. done clear
  B)
  The oxygen would increase concentration of bicarbonate, altering pH. done clear
  C)
  Increased oxygen in the blood might slow or stop breathing. done clear
  D)
  The body is not used to the oxygen, and the patient would overdose. done clear
  View Solution play_arrow

• question_answer43)
  The graph shows dissociation curves for four respiratory pigments.           
  A)

  Adult Haemoglobin	Haemoglobin with high \[C{{O}_{2}}\]	Foetal Haemoglobin	Adult myoglobin
  1	2	3	4

    done clear
  B)

  2

  1

  4

  3

    done clear
  C)

  3

  2

  1

  4

    done clear
  D)

  3

  4

  2

  1

    done clear
  View Solution play_arrow

• question_answer44)
  Match the disorders given in column-I with symptoms under column-II. Choose the answer which gives the correct combination of alphabets with numbers.

  	Column-I		Column-II
  A.	Asthma	I.	Inflammation of nasal tract
  B.	Bronchitis	II.	Spasm of bronchial muscles
  C.	Rhinitis	III.	Fully blown out alveoli
  D.	Emphysema	IV.	Inflammation of bronchi
  E.		V.	Cough with blood strained sputum

  A)
  A-IV,   B-II,   C-V,   D-I done clear
  B)
  A-V,   B-III,   C-II,    D-I done clear
  C)
               A-III,   B-I,     C-V,   D-IV done clear
  D)
  A-II,   B-IV;   C-I,    D-III done clear
  View Solution play_arrow

• question_answer45)
  After taking a long deep breath, we do not respire for some seconds due to:    
  A)
  More \[C{{O}_{2}}\] in blood.    done clear
  B)
  More \[{{O}_{2}}\] in blood. done clear
  C)
  Less \[C{{O}_{2}}\] in blood.     done clear
  D)
  Less \[{{O}_{2}}\] in blood, done clear
  View Solution play_arrow

• question_answer46)
  Bicarbonate ions can be generated in:
  A)
  Lymphocytes    done clear
  B)
                     Neutrophil done clear
  C)
  Basophil         done clear
  D)
                     RBCs done clear
  View Solution play_arrow

• question_answer47)
  A person receives a serious cut on the back of the neck that is deep enough to severely damage the brain stem in the lower medulla. The respiratory effect of this type of wound would likely be:
  A)
  Catastrophic and it might result in a complete cessation of breathing. done clear
  B)
  To reduce respiration to an irregular rhythm. done clear
  C)
  To shift the oxygen-binding curve of haemoglobin to the left. done clear
  D)
  To stimulate the production of additional diphosphoglyceric acid. done clear
  View Solution play_arrow

• question_answer48)
  Which fact suggests that most \[{{O}_{2}}\] is transported from lungs to the tissues combined with haemoglobin rather than dissolved in blood plasma?                 
  A)
  \[{{O}_{2}}\] -carrying capacity of whole blood is much higher than that of plasma and \[{{O}_{2}}\] content of blood leaving the lungs is greater than that of blood entering the lungs. done clear
  B)
  Haemoglobin can combine with\[{{O}_{2}}\]. done clear
  C)
  Oxyhaemoglobin can dissociate into haemoglobin and\[{{O}_{2}}\]. done clear
  D)
  Increase in \[C{{O}_{2}}\]-concentration decreases the \[{{O}_{2}}\]-affinity of haemoglobin. done clear
  View Solution play_arrow

• question_answer49)
  Presence of large number of alveoli around alveolar ducts opening into bronchioles in mammalian lungs is:     
  A)
  Inefficient system of ventilation with little of residual air. done clear
  B)
  Inefficient system of ventilation with high percentage of residual air. done clear
  C)
  An efficient system of ventilation with no residual air. done clear
  D)
  An efficient system of ventilation with little residual air. done clear
  View Solution play_arrow

• question_answer50)
  In expiration, diaphragm becomes:
  A)
  Flattened         done clear
  B)
                     Contract done clear
  C)
  Straightened                               done clear
  D)
  Arched done clear
  View Solution play_arrow

• question_answer51)
  Common feature of human and insect trachea is:
  A)
  Non-collapsible wall                     done clear
  B)
  Supporting rings done clear
  C)
  Ectodermal origin                        done clear
  D)
  Endodermal origin done clear
  View Solution play_arrow

• question_answer52)
  The impulse for voluntary (forced) breathing starts in:
  A)
  Medulla                                     done clear
  B)
  Vagus done clear
  C)
  Cerebral hemisphere                    done clear
  D)
  Spinal cord done clear
  View Solution play_arrow

• question_answer53)
  Membrane separating air in pulmonary alveoli from blood capillaries is:
  A)
  Alveolar epithelium done clear
  B)
  Cardiac epithelium done clear
  C)
  Endothelium of blood capillaries done clear
  D)
  Both [a] and [c] done clear
  View Solution play_arrow

• question_answer54)
  During \[C{{O}_{2}}\] transport, diffuses from erythrocytes to plasma and in turn upsets the ionic equilibrium momentary, in order to keep the ionic balance, and equal number of \[C{{l}^{-}}\] ions pass into the erythrocytes from plasma. This process is known as:
  A)
  Bicarbonate shift done clear
  B)
        Carbonation        done clear
  C)
      Hamburger phenomenon done clear
  D)
  Carbo-chlorosis done clear
  View Solution play_arrow

• question_answer55)
  Arrange the given steps of respiration in the sequence of event they occur. Choose the correct options given below.

  (i) Diffusion of gases, \[{{O}_{2}}\] and \[C{{O}_{2}}\] across the alveolar membrane.

  (ii) Transport of gases by the blood.

  (iii) Utilisation of \[{{O}_{2}}\] by the cells for catabolic reactions and the resultant releases of\[C{{O}_{2}}\].

  (iv) Pulmonary ventilation by which atmospheric air is drawn in and \[C{{O}_{2}}\] rich alveolar air is released out.

  (v) Diffusion of \[{{O}_{2}}\] and \[C{{O}_{2}}\] between the blood and tissue.

  A)
  (iii), (v), (ii), (i), (iv)                     done clear
  B)
  (iii), (ii), (v), (i), (iv) done clear
  C)
  (v), (iv), (iii), (ii), (i)                     done clear
  D)
  (i), (ii), (iii), (iv), (v) done clear
  View Solution play_arrow

• question_answer56)
  During oxygen transport, the oxyhaemoglobin at the tissue level liberates oxygen to the cells because in tissue:   
  A)
  \[{{O}_{2}}\] concentration is high and \[C{{O}_{2}}\] is low. done clear
  B)
  \[{{O}_{2}}\] concentration is low and \[C{{O}_{2}}\] is high. done clear
  C)
  \[{{O}_{2}}\] tension is high and \[C{{O}_{2}}\] tension is low. done clear
  D)
  \[{{O}_{2}}\] tension is low and \[C{{O}_{2}}\] tension is high. done clear
  View Solution play_arrow

• question_answer57)
  Asthma is caused due to:
  A)
  Infection of lungs done clear
  B)
  Spasm in bronchial muscles done clear
  C)
  Bleeding into pleural cavity done clear
  D)
  Infection of trachea done clear
  View Solution play_arrow

• question_answer58)
  The Bohr shift describes:
  A)
  The outward movement of \[C{{l}^{-}}\] from the blood cell in exchange for \[HC{{O}_{3}}^{-}\] moving into the cell. done clear
  B)
  The leftward shift of the entire oxygen equilibrium curve when temperature rises. done clear
  C)
  The rightward shift of the entire oxygen equilibrium curve when pH rises. done clear
  D)
  The rightward shift of the entire oxygen equilibrium curve when pH falls. done clear
  View Solution play_arrow

• question_answer59)
  Which of the following gases makes the most stable combination with the haemoglobin of RBCs?
  A)
  \[C{{O}_{2}}\]             done clear
  B)
                     CO done clear
  C)
  \[{{O}_{2}}\]                            done clear
  D)
  N done clear
  View Solution play_arrow

• question_answer60)
  When the carbon dioxide concentration in blood increases, the rate of breathing will:
  A)
  Remain unaffected                      done clear
  B)
  Decrease done clear
  C)
  Stop                                          done clear
  D)
  Increase done clear
  View Solution play_arrow

• question_answer61)
  Which of the following statements are true/ false?

  (i) The blood transports \[C{{O}_{2}}\] comparatively easily because of its higher solubility.

  (ii) Approximately 8.9% of \[C{{O}_{2}}\] is transported being dissolved in the plasma of blood.

  (iii) The carbon dioxide produced by the tissues, diffuses passively into the blood stream and passes into red blood corpsucles and react with water to form\[{{H}_{2}}C{{O}_{3}}\].

  (iv) The oxyhaemoglobin (\[Hb{{O}_{2}}\]) of the erythrocytes is basic.

  (v) The chloride ions diffuse from plasma into the erythrocytes to maintain ionic balance.

  A)
  (i), (iii) and (v) are true, (ii) and (iv) are false. done clear
  B)
  (i), (iii) and (v) are false, (ii) and (iv) are true. done clear
  C)
  (i), (ii) and (iv) are true, (iii) and (v) are false. done clear
  D)
  (i), (ii) and (iv) are false, (iii) and (v) are true. done clear
  View Solution play_arrow

• question_answer62)
  Which of the given statements are incorrect?

  (i) A healthy human on an average breathes times/minute.

  (ii) The volume of air involved in the breathing movements can be estimated by spirometer.

  (iii) Diaphragm is very useful in both inspiration and expiration.

  A)
  (i) and (ii)                                   done clear
  B)
  (ii) and (iii) done clear
  C)
  (i) and (iii)                                  done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer63)
  Gas exchange between maternal and foetal blood takes place in the placenta. Foetal and adult haemoglobin differ slightly in composition, and their dissociation curves are different so that oxygen can be transferred from maternal blood to foetal blood. If curve III represents the dissociation curve of adult haemoglobin, which curve would represent foetal haemoglobin? (Hint: Must foetal haemoglobin have a higher or lower affinity for oxygen than maternal haemoglobin has?)
  A)
   I                   done clear
  B)
                     II done clear
  C)
   III                                            done clear
  D)
  IV done clear
  View Solution play_arrow

• question_answer64)
  The breathing rate gets increased by the increase in the content of:
  A)
  Nitrogen         done clear
  B)
                     Oxygen done clear
  C)
  Carbon dioxide   done clear
  D)
                     Carbon monoxide done clear
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• question_answer65)
  In an old science fiction movie, the hero tried to drown a giant ant by holding its head under   water. Would this work? Why?  
  A)
  Yes, Ants use lungs to breathe much as we do. done clear
  B)
  Yes, The skin surface, covered with water, could not get \[{{O}_{2}}\] from the air. done clear
  C)
  No, Ants use gills for respiration, like crabs do. done clear
  D)
  No, Ants breathe through holes in the sides of their bodies. done clear
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• question_answer66)
  Respiratory system is derived from:
  A)
  Ectoderm                                   done clear
  B)
  Mesoderm done clear
  C)
  Endoderm        done clear
  D)
                     None of these done clear
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• question_answer67)
  When you exhale, the diaphragm:
  A)
  Relaxes and arches done clear
  B)
  Relaxes and flattens done clear
  C)
  Contracts and arches done clear
  D)
  Contracts and flattens done clear
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• question_answer68)
  About how many times per minute a man normally respires?            
  A)
   12 to 15         done clear
  B)
                     10 done clear
  C)
  72                                             done clear
  D)
  100 done clear
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• question_answer69)
  Which of the following is not involved in the neural control of ventilation?
  A)
  Neurons in the medulla done clear
  B)
  The vagus nerve done clear
  C)
  The contraction state of the diaphragm done clear
  D)
  Chemosensors on the surface of the medulla done clear
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• question_answer70)
  In which of the following animals respiration occurs without a respiratory organ?
  A)
  Fish                                           done clear
  B)
  Cockroach done clear
  C)
  Tadpole          done clear
  D)
                     Earthworm done clear
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• question_answer71)
  Book lungs are respiratory organs of:
  A)
  Molluscs        done clear
  B)
                     Mammals done clear
  C)
  Arachnids                                  done clear
  D)
  Earthworm done clear
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• question_answer72)
  Which one of the following is called inspiratory muscle in mammals?
  A)
  Radial muscle of diaphragm done clear
  B)
  External intercostal muscle done clear
  C)
  Internal intercostal muscle done clear
  D)
  Pleural muscle done clear
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• question_answer73)
  The respiratory centre, which regulate respiration, is located in:               
  A)
  Cerebral peduncle     done clear
  B)
  Vagus nerve done clear
  C)
  Pons                                         done clear
  D)
  Medulla oblongata done clear
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• question_answer74)
  Which one of the following can respire in the absence of oxygen?       
  A)
  Amoeba                                    done clear
  B)
  Tapeworm done clear
  C)
  House fly                                   done clear
  D)
  Hydra done clear
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• question_answer75)
  The disease that occurs when the haemoglobin content of the blood goes down is:
  A)
  Pleurisy                                     done clear
  B)
  Emphysema done clear
  C)
  Anaemia                                    done clear
  D)
  Pneumonia done clear
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• question_answer76)
  Refer the given figure and answer the question.

  Which of the following statement is correct regarding the above figure?

  A)
  When percentage saturation of haemoglobin is plotted against the partial pressure of oxygen, a sigmoid curve is obtained. done clear
  B)
  Binding of oxygen with haemoglobin is primarily related to partial pressure of carbon monoxide. done clear
  C)
  The given graph illustrates the amount of \[Hb{{O}_{2}}\] as similar to Hb at different\[P{{O}_{2}}\]. done clear
  D)
  None of the above done clear
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• question_answer77)
  When \[C{{O}_{2}}\] concentration in blood increases, breathing becomes:
  A)
  Slow and deep done clear
  B)
  Faster and deeper done clear
  C)
  Shallower and slow done clear
  D)
  There is no effect on breathing done clear
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• question_answer78)
  Exposure to carbon monoxide (from coal gas) is extremely dangerous and can kill a patient because:        
  A)
  The compound carboxy-haemoglobin is formed with haemoglobin which can gradually clot the blood resulting in circulatory failure. done clear
  B)
  carboxy-haemoglobin reduces the ability of blood to transport oxygen by rupturing a vast majority of erythrocytes. done clear
  C)
  carboxy-haemoglobin greatly modifies the structure of haemoglobin, thus making it lose its affinity for oxygen. done clear
  D)
  The compound formed, carboxy-haemoglobin does not allow RBCs to act for their respiratory function. done clear
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• question_answer79)
  In a germinating seed, when protein is aerobically oxidised, the R. Q. value will be:
  A)
  One                                          done clear
  B)
  Zero done clear
  C)
  More than one    done clear
  D)
                     Less than one done clear
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• question_answer80)
  Which of the following represents a larger volume of air than is normally found in the resting tidal volume of a human lung?
  A)
  Residual volume        done clear
  B)
  Inspiratory reserve volume done clear
  C)
  Expiratory reserve volume done clear
  D)
  All of the above done clear
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• question_answer81)
  The total lung capacity is represented by:
  A)
  Tidal volume + vital capacity done clear
  B)
  Tidal volume + residual volume done clear
  C)
  Vital capacity + residual volume done clear
  D)
  Inspiratory and expiratory reserve volumes done clear
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