Question 1

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

Accepted Answer

Regulation of blood glucose levels

Question 2

A patient presents with excessive mucus production and nasal congestion. Which structure is most likely inflamed?

Accepted Answer

Nasal mucosa

Question 3

Which equation best represents Boyle’s Law, which governs the relationship between pressure and volume in the lungs?

Accepted Answer

$$P_1$$ $$V_1$$ = $$P_2$$ $$V_2$$

Question 4

During inspiration, which pressure decreases to allow air to flow into the lungs?

Accepted Answer

Intrapulmonary pressure ($$P_{pul})$$

Question 5

Which structure is responsible for preventing food from entering the respiratory tract during swallowing?

Accepted Answer

Epiglottis

Question 6

A premature infant is struggling to breathe due to collapsed alveoli. Which substance is most likely deficient?

Accepted Answer

Surfactant

Question 7

Which of the following best describes the function of the nasal vestibule?

Accepted Answer

Filters coarse particles from inspired air

Question 8

Which equation correctly calculates transpulmonary pressure?

Accepted Answer

$$P_{pul} - P_{ip}$$

Question 9

Which of the following is a consequence of a pneumothorax?

Accepted Answer

Equalization of intrapleural and atmospheric pressure

Question 10

Which region of the pharynx serves only as an airway and is closed off during swallowing?

Accepted Answer

Nasopharynx

Question 11

Which of the following factors would decrease lung compliance?

Accepted Answer

Fibrosis due to chronic inflammation

Question 12

Which process is described as the diffusion of gases between systemic blood and tissues?

Accepted Answer

Internal respiration

Question 13

Which of the following is TRUE regarding hemoglobin’s affinity for carbon monoxide compared to oxygen?

Accepted Answer

Hemoglobin has a much higher affinity for carbon monoxide than for oxygen

Question 14

Which pulmonary volume is defined as the amount of air that always remains in the lungs to keep alveoli open?

Accepted Answer

Residual volume (RV)

Question 15

A patient with left-sided heart failure develops pulmonary congestion. Which factor is most affected in gas exchange?

Accepted Answer

Thickness of the respiratory membrane

Question 16

Which of the following best describes the effect of sympathetic innervation on the bronchioles?

Accepted Answer

Bronchodilation

Question 17

During an acute asthma attack, which medication is most effective in reducing airway resistance?

Accepted Answer

Epinephrine

Question 18

Which of the following is a real-life consequence of decreased hemoglobin or abnormal hemoglobin?

Accepted Answer

Anemic hypoxia

Question 19

Which brain region is primarily responsible for generating the basic rhythm of breathing?

Accepted Answer

Ventral respiratory group (VRG) of the medulla

Question 20

A person experiencing hyperventilation due to anxiety may faint. What is the physiological cause?

Accepted Answer

Cerebral vasoconstriction due to low arterial $$PCO_2$$

The Respiratory System: Structure, Function, and Clinical Implications

Study Guide - Practice Questions