Cells

Question 1

What is the flexible yet sturdy barrier that consists mostly of phospholipids an proteins?

Answer 1

Plasma membrane

Question 2

What is the basic framework of the plasma membrane?

Answer 2

Lipid bilayer

Question 3

What are the three types of lipid molecules that make up the lipid bilayer?

Answer 3

Phospholipids
Cholesterol
Glycolipids

Question 4

What proteins extend into or through the lipid bilayer amount fatty acid tails?

Answer 4

Integral proteins

Question 5

What proteins are loosely attached to the exterior or interior surface of the plasma membrane?

Answer 5

Peripheral proteins

Question 6

The plasma membrane allows some substances to move into an out of the cell for all substances

True or False

Answer 6

False

This is called selective permeability

Question 7

What are some of the lipid-soluble molecules the lipid bilayer part of the membrane is permeable to?

Answer 7

Water
Fatty acids 
Fat-soluble vitamins
Steroids
Oxygen
Carbon dioxide

Question 8

What is not permeable to the lipid bilayer?

Answer 8

Ions or polar molecules (glucose•amino acids)

Question 9

_________is the movement of a substance from one place to another due to its kinetic energy?

Answer 9

Diffusion

Question 10

What direction do substances move when undergoing net diffusion?

Answer 10

High to low concentration, or down their concentration gradient

Question 11

_______ is the net movement of the solvent through a selectively permeable membrane.

Answer 11

Osmosis