Chapter 22 - Gas Exchange

Question 0

What is the purpose of gas exchange?

Answer 0

Take oxygen in and exhale carbon dioxide

Question 1

What are the three phases in gas exchange and what happens in each phase?

Answer 1

Breathing, transport of oxygen, and exchange of gases.
Breathing - inhale oxygen and exhale carbon dioxide
Transport of oxygen - to go throughout the whole body
Exchange of gases - cells to take up oxygen and release carbon dioxide

Question 2

Describe gas exchange in an earthworm, squid, and frog

Answer 2

Earthworm - breathes primarily across its skin
Squid - use gills and oxygen and deoxygenated blood cross
Frog - tadpole has gills, frogs have lungs

Question 3

Describe gas exchange in a human

Answer 3

Goes through the nose, then the pharynx, to the larynx, to the trachea to the lungs.

Question 4

What is the role of the hemoglobin in breathing?

Answer 4

Carry oxygen