Question 1

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

Accepted Answer

To allow for gaseous exchange between air and blood

Question 2

A patient accidentally inhales a small piece of food while eating. Which structure is most likely to have failed in its function?

Accepted Answer

Epiglottis

Question 3

During vigorous exercise, a person begins to breathe through their mouth instead of their nose. Which of the following is a likely consequence of this change?

Accepted Answer

Larger dust and dirt particles are more likely to enter the lungs

Question 4

Which of the following correctly matches the respiratory structure with its primary function?

Accepted Answer

Larynx – Produces sound as air passes through connective tissue folds

Question 5

The pleura membrane is essential for normal lung function. What is the main role of the pleural cavity?

Accepted Answer

To prevent friction between the inner and outer layers during respiration

Question 6

If the bronchioles become constricted due to an allergic reaction, which of the following is the most immediate effect on respiration?

Accepted Answer

Reduced air flow to the alveoli

Question 7

Which sequence correctly traces the path of air from the external environment to the site of gas exchange?

Accepted Answer

Nasal cavity → Pharynx → Larynx → Trachea → Bronchi → Bronchioles → Alveoli

Question 8

A patient with damage to the pleura membrane is likely to experience which of the following symptoms?

Accepted Answer

Increased friction and pain during breathing

Question 9

Which of the following best explains why the alveoli are surrounded by capillaries?

Accepted Answer

To allow for efficient exchange of oxygen and carbon dioxide between air and blood

Question 10

If the epiglottis fails to close during swallowing, which of the following is the most likely outcome?

Accepted Answer

Food will enter the respiratory tract, increasing risk of choking

Question 11

A person inhales air that is not properly warmed or moistened. Which structure is most likely bypassed?

Accepted Answer

Nasal cavity

Question 12

Which of the following statements about the bronchi is correct?

Accepted Answer

They connect the trachea to the lungs and transport air in and out

Question 13

Which structure acts as an alternative entry point for air but is less effective at filtering particles?

Accepted Answer

Mouth

Question 14

A patient presents with a hoarse voice and difficulty producing sound. Which structure is most likely affected?

Accepted Answer

Larynx

Question 15

Which of the following best describes the function of the pharynx in the respiratory system?

Accepted Answer

Acts as an air passage that warms and moistens air

Question 16

If a person has only 200 million alveoli per lung due to a disease, what is the most likely physiological consequence?

Accepted Answer

Reduced surface area for gas exchange, leading to decreased oxygen uptake

Question 17

Which of the following is NOT a function of the upper respiratory tract?

Accepted Answer

Allowing gaseous exchange

Question 18

A patient with a damaged trachea would have difficulty with which of the following?

Accepted Answer

Transferring air from the larynx to the bronchi

Question 19

Which of the following best explains why the pleura membrane has two layers separated by a cavity?

Accepted Answer

To prevent friction between the lungs and chest wall during breathing

Question 20

Which structure is responsible for connecting the trachea to the lungs and dividing into smaller tubes?

Accepted Answer

Bronchi

The Respiratory System: Structure and Function

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