question_answer 33)

    Which of the following statements are true about the brain? (i) The main thinking part of brain is hind brain. (ii) Centres of hearing, smell, memory, sight, etc., are located in fore brain. (iii) Involuntary actions like salivation, vomiting, blood pressure are controlled by the medulla in the hind brain. (iv) Cerebellum does not control posture and balance of the body. (a) (i) and (ii)                        (b) (i) (ii) and (iii)            (c) (ii) and (iii)                      (d) (iii) and (iv)

Answer:

                  (c) The cerebrum (part of forebrain) is the main thinking part of the brain. It coordinates the voluntary actions of the body. It has different areas for performing different functions such as centres of hearing, smell, memory, etc. The hindbrain consists of pons (takes part in regulating respiration), cerebellum (helps in maintaining posture and balance of body) and medulla that controls involuntary actions such as breathing etc. The midbrain controls reflex movements.