Quiz on Respiratory System

Which gas decreases in percentage from inhaled to exhaled air?

• Nitrogen

• Oxygen

• Carbon dioxide

• Argon

What is the first part of the respiratory system where air enters the body?

• Lungs

• Nose

• Diaphragm

• Trachea

What is the role of the trachea in the respiratory system?

• Produces sound

• Connects the larynx to the lungs

• Filters air

• Pumps blood

What is the process of breathing in called?

• Expiration

• Inspiration

• Respiration

• Ventilation

What is the process of breathing out called?

• Inspiration

• Expiration

• Respiration

• Inhalation

What happens to the diaphragm during inspiration?

• It relaxes and rises.

• It contracts and lowers.

• It remains stationary.

• It expands and inflates.

What is the main action of the diaphragm during expiration?

• It contracts and lowers.

• It relaxes and rises.

• It expands and inflates.

• It remains stationary.

What structure follows the trachea in the pathway of air into the lungs?

• Alveoli

• Bronchioles

• Bronchus

• Diaphragm

Which of the following best describes the function of the bronchiole?

• To exchange gases

• To carry air to the alveoli

• To filter blood

• To produce mucus

What are alveoli?

• Large air sacs found in the lungs

• Small air sacs found at the terminal end of each bronchiole

• Blood vessels in the lungs

• Muscles that help in breathing