Cell Membrane

Question 1

What does the cell surface membrane contain?

Answer 1

Phospholipids.
Proteins.
Cholesterol.
Glycolipids.
Glycoproteins.

Question 2

What are glycolipids for?

Answer 2

Receptors for chemicals.
Maintain the stability of the membrane.
Helps cells attach

Question 3

What are glycoproteins for?

Answer 3

Receptors for hormones and neurotransmitters.
Helps cells attach and recognise eachother.

Question 4

Why are phospholipids useful in the membrane?

Answer 4

They make a bilayer. Allow for lipid soluble molecules to move through. Makes the membrane flexible.

Question 5

What types of proteins are in the cell membrane?

Answer 5

Intrinsic
Extrinsic

Question 6

What are the 2 types of intrinsic proteins?

Answer 6

Carrier
Channel

Question 7

What do channel proteins do?

Answer 7

Allow for water soluble ions to diffuse through.

Question 8

What do carrier proteins do?

Answer 8

Bind to ions or large molecules. Change shape in order to move them across the membrane.

Question 9

What is the benefit of cholesterol in the membrane?

Answer 9

Adds strength. Prevents water loss as it is hydrophobic. Reduce lateral movement.