Question 1

Which of the following is NOT a primary function of the respiratory system?

Accepted Answer

Regulating blood glucose levels

Question 2

Which structure is part of the lower respiratory tract?

Accepted Answer

Bronchioles

Question 3

The pleural fluid found in the pleural cavities serves which main purpose?

Accepted Answer

Provides lubrication to reduce friction during breathing

Question 4

Which law explains why air flows from areas of higher pressure to lower pressure during ventilation?

Accepted Answer

Boyle's Law

Question 5

A patient with emphysema has increased lung compliance. What is a likely consequence?

Accepted Answer

Decreased gas exchange efficiency

Question 6

Which equation correctly represents the calculation for respiratory minute volume?

Accepted Answer

$$V_E = f 	imes V_T$$

Question 7

During strenuous exercise, which muscles are recruited to assist with inhalation?

Accepted Answer

Internal intercostals and sternocleidomastoid

Question 8

Which of the following best describes the Bohr effect?

Accepted Answer

Hemoglobin releases more oxygen when pH decreases

Question 9

What is the primary reason why the oxygen content of alveolar air is less than that of atmospheric air?

Accepted Answer

Alveolar air mixes with residual air from previous respiratory cycles

Question 10

Which equation represents the conversion of carbon dioxide to bicarbonate in red blood cells?

Accepted Answer

$$CO_2 + H_2O$$ \rightarrow H_2CO_3 \rightarrow H^+ + $$HCO_3$$^-$$

Question 11

Which of the following would most likely increase alveolar ventilation?

Accepted Answer

Increasing respiratory rate while keeping tidal volume constant

Question 12

A patient at high altitude is experiencing hypoxia. Which gas law best explains the reduced oxygen availability?

Accepted Answer

Dalton's Law

Question 13

Which of the following is TRUE regarding fetal hemoglobin?

Accepted Answer

It has a higher affinity for oxygen than adult hemoglobin

Question 14

Which of the following is a restrictive lung disease?

Accepted Answer

Idiopathic pulmonary fibrosis

Question 15

Which of the following mechanisms is responsible for the majority of oxygen transport in the blood?

Accepted Answer

Bound to hemoglobin

Question 16

Which respiratory reflex prevents over-expansion of the lungs?

Accepted Answer

Inflation reflex

Question 17

Which of the following would most likely trigger bronchodilation?

Accepted Answer

Increased PCO$$_2 in $$the alveoli

Question 18

Which equation best describes the relationship between partial pressures and total pressure in a mixture of gases?

Accepted Answer

$$P_{total} = P_1$ + P_2$ + P_3$ + \ldots$$

Question 19

Which of the following is a consequence of decreased surfactant production in the lungs?

Accepted Answer

Decreased lung compliance

Question 20

Which of the following best describes the role of chemoreceptors in respiratory regulation?

Accepted Answer

They sense changes in blood pH, PO$$_2$$, and PCO$$_2$$

Respiratory System: Structure, Function, and Physiology

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