Question 1

Which of the following best describes the function of the conducting zone in the respiratory system?

Accepted Answer

It includes the respiratory passages from the anterior nares to the terminal bronchioles, functioning as a passageway for air and sound production.

Question 2

Which type of epithelium lines the nasal cavity and most of the respiratory tract, and what is its primary function?

Accepted Answer

Pseudostratified ciliated columnar epithelium; trapping and moving particles out of the airway

Question 3

A patient inhales deeply, and the pressure inside the alveoli drops below atmospheric pressure. Which equation best represents this relationship?

Accepted Answer

$$P_{alv} \u003c P_{atm}$$

Question 4

Which structure prevents the collapse of the trachea during inhalation?

Accepted Answer

C-shaped rings of hyaline cartilage

Question 5

During forced exhalation, which muscles are primarily recruited to increase thoracic pressure?

Accepted Answer

Internal intercostals and abdominal muscles

Question 6

Which of the following best explains the role of surfactant in the alveoli?

Accepted Answer

It decreases alveolar surface tension, preventing alveolar collapse during exhalation.

Question 7

A patient with asthma experiences bronchoconstriction. Which factor is most likely responsible for this response?

Accepted Answer

Activation of parasympathetic nerves releasing acetylcholine

Question 8

Which equation correctly describes the relationship between transpulmonary pressure ($$P_{tp}$$), alveolar pressure ($$P_{alv}$$), and intrapleural pressure ($$P_{ip}$$)?

Accepted Answer

$$P_{tp} = P_{alv} - P_{ip}$$

Question 9

Which of the following is the primary muscle of inhalation?

Accepted Answer

Diaphragm

Question 10

A pneumothorax occurs when air enters the pleural cavity. What effect does this have on the pressures involved in breathing?

Accepted Answer

Intrapleural pressure equals atmospheric pressure, causing lung collapse.

Question 11

Which of the following best describes the function of the mucociliary escalator?

Accepted Answer

It traps and moves inhaled particles and pathogens out of the respiratory tract.

Question 12

Which of the following structures is NOT part of the respiratory zone?

Accepted Answer

Terminal bronchioles

Question 13

Which of the following changes would most likely increase airway resistance in the lower respiratory tract?

Accepted Answer

Bronchoconstriction due to parasympathetic stimulation

Question 14

Which volume is typically the greatest in males and females during pulmonary function testing?

Accepted Answer

Vital capacity

Question 15

During quiet breathing, which phase occurs when $$P_{alv} \u003c P_{atm}$$?

Accepted Answer

Inhalation

Question 16

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

Accepted Answer

It lubricates the pleural surfaces, allowing smooth movement during breathing.

Question 17

Which of the following is a function of the respiratory mucosa?

Accepted Answer

Trapping and removal of inhaled particles and pathogens

Question 18

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

Accepted Answer

Bronchodilation

Question 19

Which of the following is the correct definition of tidal volume ($$V_T$$)?

Accepted Answer

The volume of air that moves into and out of the lungs during each respiratory cycle

Question 20

A patient is unable to clear mucus from their respiratory tract, leading to frequent infections. Which structure is most likely dysfunctional?

Accepted Answer

Cilia of the pseudostratified columnar epithelium

Respiratory System: Structure, Function, and Physiology Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard