Q: If a person’s tidal volume ($$V_T) is 500 mL $$and their respiratory rate ($$f) is 12 $$breaths per minute, what is their respiratory minute volume ($$V_E$$)?

$$V_E = 500 \times 12 = 6000 mL/$$min

Question 1

Which structure is primarily responsible for filtering, warming, and humidifying the air as it enters the respiratory system?

Accepted Answer

Nasal cavity

Question 2

A patient presents with difficulty speaking and swallowing after a neck injury. Which structure is most likely affected?

Accepted Answer

Pharynx

Question 3

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

Accepted Answer

Decreases alveolar surface tension

Question 4

During inspiration, which muscles contract to increase thoracic volume?

Accepted Answer

External intercostals and diaphragm

Question 5

Which equation correctly represents the calculation of respiratory minute volume ($$V_E$$)?

Accepted Answer

$$V_E = V_T 	imes f$$

Question 6

A patient with pneumonia has fluid accumulation in the pleural cavity. What is the most likely consequence?

Accepted Answer

Decreased gas exchange efficiency

Question 7

Which structure prevents food from entering the lower respiratory tract during swallowing?

Accepted Answer

Epiglottis

Question 8

Which of the following is NOT a function of the larynx?

Accepted Answer

Gas exchange

Question 9

If a person’s tidal volume ($$V_T) is 500 mL $$and their respiratory rate ($$f) is 12 $$breaths per minute, what is their respiratory minute volume ($$V_E$$)?

Accepted Answer

$$V_E = 500 	imes 12 = 6000 mL/$$min

Question 10

Which of the following best explains why alveolar surface tension must be reduced for effective respiration?

Accepted Answer

To prevent collapse of alveoli during expiration

Question 11

Which process is directly responsible for the exchange of gases between alveoli and pulmonary capillaries?

Accepted Answer

Diffusion

Question 12

A patient with emphysema has destruction of alveolar walls. What is the primary effect on respiratory function?

Accepted Answer

Decreased surface area for gas exchange

Question 13

Which of the following is a correct sequence of air flow from the external environment to the alveoli?

Accepted Answer

Nasal cavity → pharynx → larynx → trachea → bronchi → alveoli

Question 14

Which respiratory volume is defined as the amount of air remaining in the lungs after a maximal exhalation?

Accepted Answer

Residual volume

Question 15

Which equation correctly represents the calculation of total lung capacity ($$TLC$$)?

Accepted Answer

$$TLC = TV + IRV + ERV + RV$$

Question 16

Which of the following best describes the role of pleural fluid?

Accepted Answer

Reduces friction between pleural membranes during breathing

Question 17

A patient with a pneumothorax has air in the pleural cavity. What is the most immediate effect?

Accepted Answer

Lung collapse

Question 18

Which of the following is a function of the tracheal cartilage?

Accepted Answer

Prevents collapse of the trachea during breathing

Question 19

During forced expiration, which muscles are primarily involved?

Accepted Answer

Internal intercostals and abdominal muscles

Question 20

Which of the following best explains the importance of the mucociliary escalator in the respiratory tract?

Accepted Answer

Removes debris and pathogens from the airways

Respiratory System: Key Concepts and Exam Guide

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