Gas exchange

Recall the primary function of the respiratory system.

• To ensure each cell receives enough oxygen

• To facilitate the exchange of carbon dioxide and oxygen between the environment and our bodies

• To digest and metabolise foods

• To maintain the body's optimal pH.

State which of these is the waste gas that is expelled from the body during exhalation.

• Sulfur Dioxide

• Oxygen

• Carbon Monoxide

• Carbon Dioxide

Identify what structure is indicated by the blue arrow in the picture.

• Abdomen

• Trachea

• Vocal Cords

• Bronchi

Recall which of the following causes inhalation.

• The diaphragm contracting

• The diaphragm relaxing

• The intercostal muscles contracting

• The thorax getting smaller

In inhaled air, recall if there is a higher concentration of carbon dioxide or oxygen.

• Oxygen

• Carbon Dioxide

When you breathe, your lungs take in ___ and remove ___.

• air/oxygen

• oxygen/carbon dioxide

• carbon dioxide/waste

• waste/air

The air sacs that are covered with capillaries where gas exchange takes place

• bronchi

• lungs

• oxygen

• alveoli

Tags

NGSS.HS-LS2-5

What is the site of gas exchange?

• alveoli

• bronchus

• nose

• trachea

Tags

NGSS.HS-LS2-5

What is the name of two main branches from the trachea (one to each lung)?

• bronchi

• alveoli

• capillaries

• bronchioles

Given the following structures:

1. alveoli

2. bronchi

3. bronchioles

Which of the following is the correct order in which air would flow after inhalation?

• 1,2,3

• 2,1,3

• 2,3,1

• 3,2,1