Transport Across Cell Membrane

Question 1

What is the Cell Membrane made up of?

Answer 1

Proteins and Phospholipids (lipids)

Question 2

What is Passive Transport?

Answer 2

Occurs down a concentration gradient and Doesn’t require energy.

Question 3

What is Diffusion?

Answer 3

Passive Transport. Movement of molecules down a concentration gradient from HIGH to LOW.

Question 4

What is Osmosis?

Answer 4

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

Question 5

What Happens to an Animal Cell in Low Water Concentration?

Answer 5

Water molecules will move INTO the cell and it will burst.

Question 6

What Happens to an Animal Cell in High Water Concentration?

Answer 6

Water molecules will move OUT of the cell and it will shrink.

Question 7

What Happens to an Plant Cell in Low Water Concentration?

Answer 7

Water molecules move INTO the cell and it will become turgid.

Question 8

What Happens to an Plant Cell in High Water Concentration?

Answer 8

Water molecules move OUT of the cell and become plasmolysed.

Question 9

What is Active Transport?

Answer 9

Moves molecules / ions against the concentration gradient from LOW to HIGH. Requires energy.