Gas Exchange

What is the main function of the respiratory system?

• to provide oxygen and remove carbon dioxide from the body

• to bring oxygen to the body

• to break down food and absorb nutrients

• to remove oxygen from the body and deliver carbon dioxide

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

• Bronchi

• Trachea

• Oxygen

• Alveoli

Tags

NGSS.HS-LS2-5

The trachea leads to the...

• Bronchioles

• Bronchi

• Esophagus

• Pulmonary Vessel

In the lungs, oxygen diffuses into the blood and carbon dioxide diffuses out of the blood. This is called what?

• breathing

• gas exchange

• respiration

Which of the following is the primary function of the respiratory system?

• make carbon dioxide

• produce oxygen

• gas exchange

Which is true about diffusion?

• occurs from a higher concentration to a lower concentration

• occurs from a lower concentration to a higher concentration

Tags

NGSS.MS-LS1-2

In the diagram, oxygen diffuses from the air sac into the capillaries.

• true

• false

Tags

NGSS.MS-LS2-3

Why does oxygen and carbon dioxide diffuse in the direction shown?

• because the inhaled air has less oxygen and less carbon dioxide

• because the inhaled air has more oxygen and more carbon dioxide

• because the inhaled air has more oxygen and less carbon dioxide

• because the inhaled air has less oxygen and more carbon dioxide

Tags

NGSS.MS-LS2-3

When we inspire (inhale), our diaphragm does what?

• relaxes and moves down

• contracts and moves down

• contracts and moves up

• relaxes and moves up

What happens to the volume and pressure in the lungs when we expire (exhale)?

• volume and pressure decreases

• volume and pressure increases

• volume decreases, pressure increases

• volume increases, pressure decreases