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Respiratory System Functions Quiz

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Questions and Answers

What is the primary function of the respiratory system?

To aid in breathing, also called pulmonary ventilation

To contract the diaphragm and external intercostal muscles during inhalation

To help us smell things and create sound

To facilitate the exchange of gases between the air and the blood, and between the blood and the body's cells (correct)

What is the process called where oxygen is exchanged for carbon dioxide waste inside the lungs?

Exhalation

External respiration (correct)

Pulmonary ventilation

Inhalation

What happens to the lungs and air pressure during normal exhalation?

The lungs remain the same size and the air pressure stays constant

The lungs become larger and the air pressure drops, causing air to rush in

The lungs expand and the air pressure drops, causing air to be expelled

The lungs become smaller and the air pressure rises, causing air to be expelled (correct)

What is the name of the microscopic sacs in the lungs where the gas exchange process takes place?

Alveoli Signup and view all the answers

How does oxygen get transported through the bloodstream?

Oxygen binds to hemoglobin molecules in red blood cells Signup and view all the answers

What is the function of the upper respiratory system?

Trap foreign particles before air reaches the lungs Signup and view all the answers

Where does oxygen diffuse to from the red blood cells at the narrow capillaries?

Into body tissues Signup and view all the answers

What happens to deoxygenated blood in the respiratory system after carrying carbon dioxide back to the lungs?

It is expelled through exhalation Signup and view all the answers

Which process involves red blood cells carrying oxygen absorbed from the lungs around the body?

Internal respiration Signup and view all the answers

Where does carbon dioxide diffuse from during internal respiration?

Tissues into red blood cells Signup and view all the answers