diffusion

Question 1

What is diffusion?

Answer 1

The movement of particles from a region of higher concentration to a region of lower concentration.

Question 2

What type of particles undergo diffusion in liquids and gases?

Answer 2

Particles such as molecules and ions.

Question 3

Does diffusion move down the concentration gradient?

Answer 3

Yes

Question 4

True or False: Particles in a liquid or gas move only in one direction during diffusion.

Answer 4

False

Question 5

What happens to particles during diffusion in terms of distribution?

Answer 5

They will end up evenly spread throughout the liquid or gas.

Question 6

Fill in the blank: Substances move into and out of living cells by _______.

Answer 6

diffusion

Question 7

In the lungs, which gas diffuses from high concentration in alveolus to low concentration in blood?

Answer 7

Oxygen

Question 8

In the lungs, which gas diffuses from high concentration in blood to low concentration in alveolus?

Answer 8

Carbon dioxide

Question 9

List examples of diffusion in biological systems.

Answer 9

Urea, from the blood to the kidney
Carbon Dioxide, from the blood to the alveoli
Oxygen, from alveoli to the blood