question_answer 26)

  In breathing movements, air volume can be estimated by (a) stethoscope                                                                (b) hygrometer                 (c) sphygmomanometer                                               (d) spiro meter

Answer:

                  (d) Spirometer is the device used to measure the volume of air involved in breathing movements and it also helps in clinical assessment of pulmonary functions. Stethoscope is a medical device used for listening the internal sounds of an animal or human body. Hygrometer is a device used for measuring the moisture content in the atmosphere, i.e., humidity. Sphygmomanometer is a device that is used to measure blood pressure.