The volume of air in the lungs and the rate at which it is exchanged during inspiration and expiration was measured. The following diagram shows a group of the lung volumes and capacities: Study the diagram carefully and explain briefly the following:

(e) Residual volume

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Solution

Residual volume (RV) - Even after forcible expiration, there is some air left in the lungs and is referred to as residual volume. It is about 1500 mL.

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Q. The volume of air in the lungs and the rate at which it is exchanged during inspiration and expiration was measured. The following diagram shows a group of the lung volumes and capacities: Study the diagram carefully and explain briefly the following:

(d) Vital capacity

Q. The volume of air in the lungs and the rate at which it is exchanged during inspiration and expiration was measured. The following diagram shows a group of the lung volumes and capacities:
Study the diagram carefully and explain briefly the following:
(a)Tidal volume.

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. Choose the correct statements with regard to human respiration.
(A) Inspiration is facilitated by the contraction of phrenic and external inter-costal muscles
(B) Healthy human can inhale or exhale about 2000 to 3000 ml of air per minute
(C) Functional residual capacity represent the volume of left out air in lungs after expiration
(D) Total lung capacity is the total volume of air that could be accomodated in the lungs after forced inspiration.

1200 ml volume of air which always remains in the lungs even after forcible expiration is called

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Reserve Volume/Residual Volume

Standard XIII Biology

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The volume of air in the lungs and the rate at which it is exchanged during inspiration and expiration was measured. The following diagram shows a group of the lung volumes and capacities: Study the diagram carefully and explain briefly the following: (e) Residual volume

Residual volume (RV) - Even after forcible expiration, there is some air left in the lungs and is referred to as residual volume. It is about 1500 mL.

The volume of air in the lungs and the rate at which it is exchanged during inspiration and expiration was measured. The following diagram shows a group of the lung volumes and capacities: Study the diagram carefully and explain briefly the following:

(e) Residual volume