correct statement. 14.Assertion: Inspiration is initiated by the contraction of the diaphragm which increasts the volume of the thoracic chamber in the antero-posterior axis. Reason: The contraction of external intercostal muscles lifts up the ribs and the sternum causing an increase in the volume of the thoracic chamber in the dorso ventral axis. a. Assertion and reason both are correct statements and reason is correct explanation for assertion. b. Assertion and reason both are correct statements but reason is not correct explanation for assertion. c. Assertion is correct statement but reason is wrong statement. d. Assertion is wrong statement but reason is correct statement
Answers
Answered by
2
Answer:
a) assertion and reason both are correct and reason is the correct explanation for assertion
Answered by
10
Answer:
Option (a) is correct. Assertion and reason both are correct statements and reason is correct explanation for assertion.
Explanation:
- Inspiration is initiated by the contraction of the diaphragm which increases the volume of the thoracic chamber in the antero-posterior axis. The contraction of external intercostal muscles lifts up the ribs and the sternum causing an increase in the volume of the thoracic chamber in the dorso ventral axis.
- An increase in thoracic volume cause simillar increase in pulmonary volume.
- The increase in pulmonary volume decreases the pressure (Intra pulmonary) less then the atmospheric pressure that is Inspiration.
Know more :
Inspiration is the stage of Breathing.
There are two stages of Breathing (i) Inspiration and (ii) Expiration.
- Inspiration : This occurs if pressure (Intra pulmonary) is less than atmospheric pressure.
- Expiration :This occurs if pressure (Intra pulmonary) within the lungs is higher than atmospheric pressure.
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