$$\text{Pulmonary ventilation} = \text{respiratory rate} \times \text{tidal volume}$$

Question 1

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

Accepted Answer

Chemical breakdown of food into small organic molecules that can be absorbed by the digestive epithelium

Question 2

The lower respiratory system consists of which of the following structures?

Accepted Answer

Larynx, trachea, bronchi, and lungs

Question 3

Damage to which structure would most directly impair speech production?

Accepted Answer

Larynx

Question 4

The Heimlich maneuver is typically performed to relieve an obstruction in which part of the respiratory tract?

Accepted Answer

Larynx

Question 5

The trachea branches within the mediastinum into the right and left _______.

Accepted Answer

Main bronchi

Question 6

During cellular respiration, cells ________ oxygen to ________ ATP.

Accepted Answer

Consume; produce

Question 7

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

Accepted Answer

They create air turbulence to enhance air filtration and warming

Question 8

The ________ zone, which has the function of gas exchange, consists of the respiratory bronchioles, alveolar ducts, alveolar sacs, and alveoli.

Accepted Answer

Respiratory

Question 9

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

Accepted Answer

Lightening the skull bones and mucus production

Question 10

Which cartilage of the larynx forms the laryngeal prominence (Adam's apple)?

Accepted Answer

Thyroid cartilage

Question 11

The false vocal cords do not produce sound. Why, then, are they still useful?

Accepted Answer

They prevent foreign objects from entering the glottis

Question 12

Which cell type in the alveolus is primarily responsible for gas exchange?

Accepted Answer

Type I cells

Question 13

Which of the following best describes the respiratory membrane?

Accepted Answer

Alveolar and capillary walls plus their fused basement membranes

Question 14

Which of the following statements about the lungs is TRUE?

Accepted Answer

The left lung has a cardiac notch to accommodate the heart

Question 15

Which of the following best describes the relationship between pressure and volume during pulmonary ventilation?

Accepted Answer

An increase in volume decreases air pressure

Question 16

What step is missing in the following sequence? Breathing muscles contract → ? → air moves into lungs

Accepted Answer

Air pressure in the lungs decreases

Question 17

Pulmonary ventilation can be calculated using which of the following equations?

Accepted Answer

$$	ext{Pulmonary ventilation} = 	ext{respiratory rate} 	imes 	ext{tidal volume}$$

Question 18

If atmospheric pressure is 760 mm Hg and oxygen makes up 20.9% of the air, what is the partial pressure of oxygen ($$P_{O_2$}$$)?

Accepted Answer

$$P_{O_2$} = 760 	imes 0.209 = 159 	ext{ mm Hg}$$

Question 19

Which of the following best describes the direction of gas movement during external respiration in the lungs?

Accepted Answer

Oxygen moves from the alveoli to the blood; carbon dioxide moves from the blood to the alveoli

Question 20

Gas exchange refers to the exchange of oxygen and carbon dioxide between:

Accepted Answer

Both A and B

Question 21

Most carbon dioxide is transported in the blood in which form?

Accepted Answer

As bicarbonate ions ($$HCO_3$$^-$$)

Study Guide: Anatomy & Physiology of the Respiratory System

Study Guide - Practice Questions