Passive Transport

Review Questions

Water moves via osmosis _________.

  1. throughout the cytoplasm
  2. from an area with a high concentration of other solutes to a lower one
  3. from an area with a high concentration of water to one of lower concentration
  4. from an area with a low concentration of water to higher concentration

Hint:

C

The principal force driving movement in diffusion is the __________.

  1. temperature
  2. particle size
  3. concentration gradient
  4. membrane surface area

Hint:

C

What problem is faced by organisms that live in fresh water?

  1. Their bodies tend to take in too much water.
  2. They have no way of controlling their tonicity.
  3. Only salt water poses problems for animals that live in it.
  4. Their bodies tend to lose too much water to their environment.

Hint:

A

In which situation would passive transport not use a transport protein for entry into a cell?

  1. water flowing into a hypertonic environment
  2. glucose being absorbed from the blood
  3. an ion flowing into a nerve cell to create an electrical potential
  4. oxygen moving into a cell after oxygen deprivation

Hint:

D