Physiology Quiz -
Respiratory Physiology - Part 1

Test your basic knowledge of respiratory physiology by taking this simple quiz.

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(1) Approximately, how many alveoli are there in both (i.e., left and right) human lungs combined?

	(A) 30,000
	(B) 300,000
	(C) 3,000,000
	(D) 30,000,000
	(E) 300,000,000

(2) The respiratory zone of the lungs is composed of:

	(A) Trachea
	(B) Primary bronchi
	(C) Terminal bronchioles
	(D) Respiratory bronchioles
	(E) Alveoli

(3) By the time inspired air reaches the respiratory exchange surfaces, the partial pressure of water (water vapor pressure) in this gas mixture is __________. Assume normal body temperature (37 °C).

	(A) 10 mm Hg
	(B) 37 mm Hg
	(C) 47 mm Hg
	(D) 100 mm Hg
	(E) 760 mm Hg

(4) Which of the following is (are) responsible for the release of surfactant molecules into the air-filled lumen of the alveoli?

	(A) Type I alveolar cell
	(B) Type II alveolar cell
	(C) Lung macrophages
	(D) A and B only
	(E) A, B, and C

(5) In the lungs, which one of the following is NOT a barrier to gas exchange between red blood cells and the alveolar space?

	(A) A fluid layer of water and surfactants covering the luminal surface of alveolar cells
	(B) Basement membranes of endothelial and alveolar cells
	(C) Alveolar cells
	(D) Smooth muscle cells surrounding the endothelial cells
	(E) The plasma membrane of the endothelial cells

(6) The maximum amount of air that can be expired after a maximum inspiration is:

	(A) Tidal volume
	(B) Vital capacity
	(C) Expiratory reserve volume
	(D) Inspiratory reserve volume
	(E) Total lung volume

(7) This volume of air cannot be exhaled from the lungs regardless of the magnitude of expiration:

	(A) Vital capacity
	(B) Inspiratory reserve volume
	(C) Residual volume
	(D) Expiratory reserve volume
	(E) Tidal volume

Checking your answers...

Posted: Friday, January 2, 2015
Last updated: Tuesday, March 11, 2025

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Physiology Quiz -Respiratory Physiology - Part 1

Physiology Quiz -
Respiratory Physiology - Part 1