MICROANATOMY

ENDOCRINE ORGANS AND RESPIRATORY SYSTEM

RESPIRATORY SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Expiratory reserve volume is defined as
A
amount of air inspired and expired with each normal breath during rest or exercise.
B
the maximum volume that can be exhaled.
C
the delivery of oxygen from the lungs to the bloodstream.
D
the maximum volume that can be inhaled.
Explanation: 

Detailed explanation-1: -To sum up: Your expiratory reserve volume is the amount of extra air-above anormal breath-exhaled during a forceful breath out. The average ERV volume is about 1100 mL in males and 800 mL in females.

Detailed explanation-2: -The extra volume of air that can be expired with maximum effort beyond the level reached at the end of a normal, quiet expiration.

Detailed explanation-3: -The expiratory reserve volume (ERV) is the additional air that can be forcibly exhaled after the expiration of a normal tidal volume. The residual volume (RV) is the volume of air remaining in the lungs after maximal exhalation.

Detailed explanation-4: -Expiratory reserve volume is the maximal volume of air that can be exhaled from the end-expiratory position. This is the difference between the volume of air left in the lung at the conclusion of normal expiration versus at the conclusion of maximal expiration. Expiratory reserve volume is about 1.1 litres or 1100 ml.

Detailed explanation-5: -The average total lung capacity of an adult human male is about 3 litres of air. Tidal breathing is normal, resting breathing; the tidal volume is the volume of air that is inhaled or exhaled in only a single such breath.

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