Expiration is normally brought about by the relaxation of diaphragm

True

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False

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Solution

The correct option is A True
The relaxation of external intercostal muscles and diaphragm leads to return of diaphragm, ribs, and sternum to resting position thus restoring thoracic cavity to pre-inspiratory volume. The pressure in the lungs increases and the air is exhaled.
So, the correct answer is option A.

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Similar questions

Q. State whether the following statements are true or false.
Inspiration is normally brought about by the relaxation of inspiratory muscles.

Q. Consider the following four statements and select the correct option stating which ones are true (T) and which ones are false (F).
(i) Expiration is normally brought about by the relaxation of inspiratory muscles.
(ii) Oxyhaemoglobin can hold much less carbon dioxide in the form of carbaminohaemoglobin than what deoxyhaemoglobincan.
(iii) A person can expel air the air from the lungs by a forceful expiration.
(iv) A rise in

P C O_{2}

increases the oxygen - affinity of haemoglobin.

Fill in the blanks

___i___is the volume of air that you take in during normal inspiration, or breathe out during normal expiration. The additional volume of air a person can inspire, beyond the tidal volume by putting in extra effort is____ii_____. The additional volume a person can expire, beyond the tidal volume, that is, after a normal expiration is normally ____iii_____.The volume of air remaining in the lungs after a maximal expiration i.e., the residual volume is normally ____iv_____.

Q. During normal expiration, the diaphragm is:

Q. The focal length of a normal and relaxed eye lens is about -

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