$$\text{Respiratory\ minute\ volume} = \text{Respiratory\ rate} \times \text{Tidal\ volume}$$

Question 1

Which of the following best describes the primary function of the respiratory system?

Accepted Answer

To provide surface area for gas exchange between air and circulating blood

Question 2

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

Accepted Answer

Epiglottis

Question 3

A patient presents with thick, sticky mucus and frequent respiratory infections. Which congenital disorder is most likely responsible?

Accepted Answer

Cystic fibrosis

Question 4

Which of the following is a function of the cilia in the respiratory epithelium?

Accepted Answer

Moving mucus and trapped particles toward the pharynx

Question 5

Which of the following equations correctly represents the calculation of respiratory minute volume?

Accepted Answer

$$	ext{Respiratory\ minute\ volume} = 	ext{Respiratory\ rate} 	imes 	ext{Tidal\ volume}$$

Question 6

Which of the following best explains why gas exchange at the alveoli is so efficient?

Accepted Answer

The distance for diffusion is short and gases are lipid-soluble

Question 7

A patient with a pulmonary embolism is most likely to experience which of the following symptoms?

Accepted Answer

Sudden chest pain and difficulty breathing

Question 8

Which of the following statements about hemoglobin is correct?

Accepted Answer

Fetal hemoglobin binds oxygen more strongly than adult hemoglobin

Question 9

Which of the following best describes the effect of surfactant in the alveoli?

Accepted Answer

It reduces surface tension, preventing alveolar collapse during exhalation

Question 10

During forced exhalation, which muscles are primarily involved?

Accepted Answer

Internal intercostals and abdominal muscles

Question 11

Which of the following is a correct comparison between external and internal respiration?

Accepted Answer

External respiration occurs in the alveoli; internal respiration occurs in systemic tissues

Question 12

A newborn with stiff lungs and impaired gas exchange is most likely suffering from which condition?

Accepted Answer

Neonatal respiratory distress syndrome (NRDS)

Question 13

Which of the following best describes the role of the medulla oblongata in respiration?

Accepted Answer

It regulates the rate and depth of involuntary breathing

Question 14

Which of the following is a consequence of a pneumothorax?

Accepted Answer

Collapse of the affected lung (atelectasis)

Question 15

Which equation correctly represents Henry’s Law as it applies to gas exchange?

Accepted Answer

$$C = kP$$

Question 16

Which of the following is a direct effect of high arterial $$P_{CO_2$} ($$hypercapnia) on the respiratory system?

Accepted Answer

Stimulation of chemoreceptors to increase rate and depth of breathing

Question 17

Which of the following best explains why the right lung is shorter than the left lung?

Accepted Answer

The right lung is displaced upward by the liver

Question 18

Which of the following is a real-life example of the interaction between the respiratory and cardiovascular systems?

Accepted Answer

Chemoreceptor reflexes increase both respiratory rate and blood pressure during exercise

Question 19

Which of the following is a plausible consequence of a cleft palate in a newborn?

Accepted Answer

Difficulty feeding and increased risk of respiratory infections

Question 20

Which of the following best describes the effect of aging on the respiratory system?

Accepted Answer

Decreased lung compliance and vital capacity due to elastic tissue deterioration

The Respiratory System: Structure, Function, and Clinical Correlates

Study Guide - Practice Questions