Question 1

Which process allows oxygen to move from the air into the blood in the lungs?

Accepted Answer

Diffusion across exchange surfaces

Question 2

What is the primary function of the respiratory system?

Accepted Answer

To provide surface area for gas exchange between air and blood

Question 3

Which structure is NOT part of the upper respiratory system?

Accepted Answer

Bronchi

Question 4

Where does gas exchange primarily occur in the respiratory tract?

Accepted Answer

Alveoli

Question 5

Which type of epithelium lines the nasal cavity and superior portion of the pharynx?

Accepted Answer

Pseudostratified ciliated columnar epithelium

Question 6

What is the role of cilia in the respiratory epithelium?

Accepted Answer

Sweep mucus and trapped debris toward the pharynx

Question 7

Which cells engulf small particles that reach the lungs?

Accepted Answer

Alveolar macrophages

Question 8

Which layer of the respiratory mucosa contains smooth muscle cells that encircle the lumen of bronchioles?

Accepted Answer

Lamina propria

Question 9

Which of the following is a function of the respiratory defense system?

Accepted Answer

Filtration in the nasal cavity to remove large particles

Question 10

Which structure is responsible for producing sounds in the respiratory system?

Accepted Answer

Larynx

Question 11

Which type of epithelium is found in the alveoli?

Accepted Answer

Simple squamous epithelium

Question 12

Which portion of the respiratory tract carries air to and from the exchange surfaces of the lungs?

Accepted Answer

Conducting portion

Question 13

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

Accepted Answer

Bathes exposed surfaces and traps debris

Question 14

Which of the following is a correct pathway for oxygen transport in the body?

Accepted Answer

From lungs to peripheral tissues

Question 15

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

Accepted Answer

Digesting nutrients

Question 16

Which structure is part of the lower respiratory system?

Accepted Answer

Larynx

Question 17

Which of the following best describes the conducting portion of the respiratory tract?

Accepted Answer

Passageways that carry air to and from exchange surfaces

Question 18

Which cell type is responsible for producing mucus in the respiratory epithelium?

Accepted Answer

Mucous cells

Question 19

Which of the following is a real-life consequence of a malfunctioning respiratory defense system?

Accepted Answer

Increased risk of lung infections due to trapped debris not being removed

Question 20

Which of the following best explains why the alveolar epithelium is composed of simple squamous cells?

Accepted Answer

To facilitate rapid gas exchange due to minimal diffusion distance

Chapter 23: The Respiratory System – Structure and Function

Study Guide - Practice Questions