Cell Transport

Question 1

Cell Membrane/Plasma Membrane

Answer 1

Role: Maintains homeostasis.
It acts as a barrier that keeps wanted things in and unwanted things out.
Structure: Made up of a phospholipid bilayer & contains proteins.

Question 2

Cell Transport

Answer 2

Movement of materials across cell membranes.

Question 3

Passive Transport

Answer 3

Does not require energy to move molecules from HIGH to LOW concentration.
(Diffusion, Facilitated diffusion, Osmosis)

Question 4

Simple Diffusion

Answer 4

Movement of small particles across the cell membrane. High to Low concentration.

Question 5

Facilitated Diffusion

Answer 5

Requires help from channel and carrier proteins to move particles from a HIGH to LOW concentration.
Channel proteins: a tube-like protein that selectively diffuses particles.
Carrier proteins: Changes shape when a particle binds to it.

Question 6

Osmosis

Answer 6

The movement of water through a permeable membrane from HIGH to LOW concentration.

Question 7

Active Transport

Answer 7

Requires energy to move molecules from LOW to HIGH concentration.
PROTEIN PUMPS is required to pump materials against the gradient concentration.