Question 1

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

Accepted Answer

To bring in oxygen for cellular metabolism and remove carbon dioxide

Question 2

During inhalation, which of the following changes occur in the thoracic cavity?

Accepted Answer

The diaphragm contracts and moves downward, increasing thoracic volume

Question 3

Gas exchange in the lungs occurs across the respiratory membrane. Which structures make up this membrane?

Accepted Answer

Both the alveolar and capillary epithelium, plus the fused basal lamina

Question 4

Which of the following best describes the process of external respiration?

Accepted Answer

Gas exchange between air in the lungs and red blood cells

Question 5

What is the main function of the conducting zone of the respiratory system?

Accepted Answer

Transport, warm, humidify, and filter air

Question 6

Which of the following is a function of the nasal cavity?

Accepted Answer

Filtering, warming, and humidifying incoming air

Question 7

Which type of epithelium lines most of the nasal cavity and the trachea?

Accepted Answer

Pseudostratified ciliated columnar epithelium

Question 8

A patient with a deviated nasal septum may experience which of the following symptoms?

Accepted Answer

Disrupted airflow and possible breathing difficulties

Question 9

Which of the following best explains why air rushes into the lungs during inspiration?

Accepted Answer

The air pressure within the lungs decreases as the thoracic cavity increases in size

Question 10

Which of the following cell types in the alveoli is responsible for producing surfactant?

Accepted Answer

Type II alveolar cells

Question 11

A premature infant is having difficulty inflating their lungs. Which of the following is the most likely cause?

Accepted Answer

Underdeveloped Type II alveolar cells and insufficient surfactant

Question 12

Which of the following is true regarding the right and left main (primary) bronchi?

Accepted Answer

The right bronchus is wider, shorter, and more vertical than the left

Question 13

Which of the following best describes the function of the pleurae in the lungs?

Accepted Answer

They are serous membranes that reduce friction during breathing

Question 14

Which of the following would most likely result from the build-up of scar tissue in the stroma of the lungs?

Accepted Answer

Decreased ability of the lungs to inflate and deflate

Question 15

Which of the following best describes the role of cilia in the respiratory tract?

Accepted Answer

They move sheets of mucus toward the posterior nasal cavity

Question 16

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

Accepted Answer

Trachea → Main bronchi → Lobar bronchi → Segmental bronchi → Bronchioles → Alveoli

Question 17

Which of the following best explains the effect of cigarette smoke on the respiratory epithelium?

Accepted Answer

It paralyzes cilia, leading to mucus build-up and 'smoker's cough'

Question 18

Which of the following structures is responsible for equalizing air pressure between adjacent alveoli?

Accepted Answer

Alveolar pores

Question 19

A patient presents with chronic inflammation and excess mucus production in the airways, leading to difficulty exhaling. Which condition is most likely?

Accepted Answer

Emphysema

Question 20

Which of the following best describes the difference between true and false vocal cords?

Accepted Answer

True vocal cords are involved in sound production, while false vocal cords provide support

The Respiratory System: Structure, Function, and Physiology

Guida di studio - Domande di pratica

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