Question 1

Which of the following best describes the function of the nasal conchae during inhalation?

Accepted Answer

They increase the surface area to filter, heat, and moisten incoming air.

Question 2

A patient presents with a sinus headache due to a vacuum created in the paranasal sinuses. Which process most likely led to this condition?

Accepted Answer

Absorption of air following blockage of sinus passageways due to sinusitis.

Question 3

Which structure is responsible for closing off the nasopharynx during swallowing to prevent food from entering the nasal cavity?

Accepted Answer

The soft palate and uvula

Question 4

During a severe asthma attack, which anatomical change in the bronchioles most directly increases airway resistance?

Accepted Answer

Contraction of smooth muscle in the bronchioles

Question 5

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

Accepted Answer

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

Question 6

A person who has suffered damage to the cilia lining their trachea due to chronic smoking will most likely experience which of the following symptoms?

Accepted Answer

Increased accumulation of mucus in the lungs, leading to frequent coughing

Question 7

Which of the following best explains why the right main bronchus is more likely to be the site of inhaled foreign object obstruction?

Accepted Answer

It is wider, shorter, and more vertical than the left main bronchus.

Question 8

Which of the following is the primary function of type II alveolar cells?

Accepted Answer

Secretion of surfactant to reduce surface tension in the alveoli

Question 9

A patient with pleurisy is experiencing sharp pain with each breath. What is the most likely physiological cause of this pain?

Accepted Answer

Friction between inflamed pleural surfaces during breathing

Question 10

Which of the following best describes the role of the glottis during the Valsalva’s maneuver?

Accepted Answer

It closes to prevent exhalation, increasing intra-abdominal pressure.

Question 11

Which equation best represents the process of external respiration occurring in the lungs?

Accepted Answer

$$O_2$$ diffuses from alveoli into blood; $$CO_2$$ diffuses from blood into alveoli

Question 12

Which of the following is a direct consequence of the loss of cartilage in the bronchioles as airways branch deeper into the lungs?

Accepted Answer

Bronchioles become more capable of constricting or dilating due to increased smooth muscle.

Question 13

A patient with left-sided heart failure develops pleural effusion. Which fluid is most likely accumulating in the pleural cavity?

Accepted Answer

Blood filtrate (watery fluid from lung capillaries)

Question 14

Which of the following best explains why the lungs are spongy and elastic?

Accepted Answer

They are composed mostly of alveoli and elastic connective tissue (stroma).

Question 15

Which of the following is a function of the paranasal sinuses?

Accepted Answer

Lighten the skull and help warm and moisten air

Question 16

Which of the following best describes the blood supply to the alveoli?

Accepted Answer

Pulmonary arteries deliver deoxygenated blood to alveoli for gas exchange.

Question 17

Which of the following is a correct statement about the respiratory membrane?

Accepted Answer

It is very thin, allowing rapid gas exchange by simple diffusion.

Question 18

A patient is unable to speak above a whisper after a viral infection. Which structure is most likely affected?

Accepted Answer

Vocal folds (true vocal cords)

Question 19

Which of the following best describes the function of alveolar macrophages?

Accepted Answer

They remove debris and pathogens from alveolar surfaces.

Question 20

Which of the following best explains why pleural fluid is essential for normal lung function?

Accepted Answer

It provides lubrication and surface tension, assisting in lung expansion and recoil.

Anatomy & Physiology Study Guide: The Respiratory System

Guida di studio - Domande di pratica

Study guide - Flashcard