Q: If the tidal volume is 500 mL, the respiratory rate is 12 breaths per minute, and the anatomic dead space is 150 mL, what is the alveolar ventilation ($$V_A$$)?

$$V_A = 12 \times (500 - 150) = 4200 mL/$$min

Q: Which equation represents the calculation of vital capacity?

$$\text{Vital Capacity} = ERV + VT + IRV$$

Question 1

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

Accepted Answer

Regulating blood glucose levels by releasing insulin into the bloodstream.

Question 2

Which structure is responsible for preventing solids and liquids from entering the respiratory tract during swallowing?

Accepted Answer

Epiglottis

Question 3

The conducting portion of the respiratory tract extends from the nasal cavity to which structure?

Accepted Answer

Smallest bronchioles

Question 4

Which type of epithelium lines the gas exchange surfaces of the alveoli?

Accepted Answer

Simple squamous epithelium

Question 5

What is the primary function of the mucus escalator in the respiratory tract?

Accepted Answer

To trap and remove debris and pathogens from the airway

Question 6

Which equation best represents Boyle’s law as it applies to pulmonary ventilation?

Accepted Answer

$$P = 1/V$$

Question 7

During inhalation, which of the following occurs?

Accepted Answer

Thoracic cavity volume increases and pressure decreases

Question 8

Which respiratory volume is defined as the amount of air moved into or out of the lungs during a single respiratory cycle under resting conditions?

Accepted Answer

Tidal volume (VT)

Question 9

A patient with asthma experiences extreme bronchoconstriction. Which structure is most directly affected?

Accepted Answer

Bronchioles

Question 10

Which formula calculates the respiratory minute volume ($$V_E$$)?

Accepted Answer

$$V_E = f 	imes V_T$$

Question 11

If the tidal volume is 500 mL, the respiratory rate is 12 breaths per minute, and the anatomic dead space is 150 mL, what is the alveolar ventilation ($$V_A$$)?

Accepted Answer

$$V_A = 12 	imes (500 - 150) = 4200 mL/$$min

Question 12

Which law states that the amount of a particular gas in solution is directly proportional to its partial pressure at a set temperature?

Accepted Answer

Henry’s law

Question 13

During external respiration, which direction does oxygen diffuse?

Accepted Answer

From alveoli to blood

Question 14

Which factor causes the oxygen-hemoglobin saturation curve to shift to the right, resulting in hemoglobin releasing more oxygen?

Accepted Answer

Increase in 2,3-bisphosphoglycerate (BPG)

Question 15

Which of the following is the most common cause of hypercapnia?

Accepted Answer

Hypoventilation

Question 16

Which condition is characterized by destruction of alveolar surfaces, resulting in inadequate surface area for gas exchange and increased lung compliance?

Accepted Answer

Emphysema

Question 17

Which equation represents the calculation of vital capacity?

Accepted Answer

$$	ext{Vital Capacity} = ERV + VT + IRV$$

Question 18

Which respiratory reflex is triggered by stretch receptors in the lungs to prevent overexpansion during forced breathing?

Accepted Answer

Inflation reflex

Question 19

Which structure is responsible for the majority of air movement during quiet inhalation?

Accepted Answer

Diaphragm

Question 20

Which of the following is a consequence of smoking on respiratory function?

Accepted Answer

Increased risk of lung cancer and emphysema

Comprehensive Study Notes: The Respiratory System (Anatomy & Physiology)

Study Guide - Practice Questions

Study Guide - Flashcards