2 - 2 Cell Transport

Question 1

Cell Membrane

Answer 1

• Protects the cell.
• Maintains the shape of the cell.
• Controls what enters and leaves the cell.

Question 2

Semi-permeability

Answer 2

The Cell Membrane is Semi-permeable so only Small molecules can pass through and Large ones get stuck; like a strainer.

Question 3

Cell Transport

Answer 3

The cell membrane is made of Lipids (fat) and Proteins.

Question 4

How do substances pass through a cell membrane?

Answer 4

• Small molecules flow through the gaps between the lipids.
  (Ex. Oxygen, Water, Carbon Dioxide)
  -The protein channels allow larger molecules to pass through.
  (Ex. Glucose, Starch)

Question 5

Passive Transport

Answer 5

Also known as Diffusion and does not require energy.

• Molecules flow from a High concentration → Low concentration until the concentrations are balanced.
• If the process involves water it’s called osmosis.

Question 6

Active Transport

Answer 6

Requires energy and large molecules pass through Carrier Proteins.