Plasma Membrane

Question 1

What is the function of the plasma membrane?

Answer 1

To maintain homeostasis

Question 2

How does the plasma membrane maintain homeostasis?

Answer 2

By controlling substances entering and leaving the cell ( selective )

Question 3

What is the property of a membrane that allows some materials to pass through while keeping others out ?

Answer 3

Selective ( semi) permeability

Question 4

How many layers are found in the cell membrane?

Answer 4

4

Question 5

What 4 things are found in the plasma membrane ?

Answer 5

Cholesterol , transport proteins , carbohydrates, and phospholipids

Question 6

What stabilizes the membrane by preventing phospholipids from sticking together?

Answer 6

Cholesterol

Question 7

What helps move large molecules across the membrane ( ex : glucose ) ?

Answer 7

Transport proteins

Question 8

What are used for cell recognition and attachment?

Answer 8

Carbohydrates

Question 9

What has a phosphate head and fatty acid tail?

Answer 9

Phospholipids

Question 10

Phosphate + glycerol =

Answer 10

Phosphate

Question 11

Hydrophilic means

Answer 11

Attracted to water

Question 12

Hydrophobic means

Answer 12

Repelled by water

Question 13

What part of the phospholipid is hydrophilic ?

Answer 13

The head

Question 14

What sort of the phospholipid is hydrophobic?

Answer 14

The tails

Question 15

Can phospholipids move around and if so where ?

Answer 15

Yes the can. They can move sideways through their layer,but not from one layer to another

Question 16

Name given to this model of the plasma membrane

Answer 16

Fluid mosaic model

Question 17

Because the phospholipids are free to move within the membrane

Answer 17

Fluid

Question 18

Because of the pattern it produces when viewed from viewers

Answer 18

Mosaic