PASSIVE-TRANSPORT MECHANISMS

Question 1

Diffusion

Answer 1

Movement of a substance from an area of high concentration to an area of low concentration.

Question 2

Facilitated diffusion

Answer 2

Helper molecule within the membrane assists movement of substances from area of high concentration to area of low concentration.

Question 3

Osmosis

Answer 3

Diffusion of water (solvent) from an area with more water to an area with less water; the water compartments are separated by a semipermeable membrane.

Question 4

Filtration

Answer 4

The pushing of water & dissolved substances from an area of high pressure to an area of low pressure; the water & dissolved substances are pushed.

Question 5

Passive transport mechanisms require no additional energy in the form of ATP

Answer 5

Ex- downward movement of a ball on a hill.

Question 6

What is the most common transport mechanism?

Answer 6

Diffusion

-From higher concentration to lower concentration.

Question 7

The point at which no further net diffusion occurs is called

Answer 7

Equilibrium

Question 8

During osmosis, the water diffuses from an area with more water to one with ____. The dissolved substances,however,do not move

Answer 8

1.)Less

Question 9

Sometimes Osmosis is described as a _____ pressure

Answer 9

Pulling

Question 10

Na+

Answer 10

Sodium

-Said to pull or hold water