Gas exchange

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

• make carbon dioxide

• produce oxygen

• gas exchange

Trachea is also known as?

• voicebox

• windpipe

• throat

Larynx is also known as?

• voice box

• windpipe

• throat

Pharynx is also known as?

• voice box

• windpipe

• throat

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 inspire (inhale)?

• volume and pressure decreases

• volume and pressure increases

• volume decreases, pressure increases

• volume increases, pressure decreases

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

Every cell in our body needs a supply of oxygen. The cells use oxygen for ___?

• respiration

• breathing

• digestion

Air is around 20% oxygen.

• true

• false

Air is around 20% carbon dioxide.

• true

• false