Plasma Membrane

Question 0

How does the membrane maintain homeostasis

Answer 0

Maintains homeostasis because it is selectively permeable

Question 1

Function

Answer 1

To control movement of substances into and out of the cell

Question 2

Phospholipids

Answer 2

Phosphate head (hydrophilic) is water loving contains phosphate

Fatty acid tail (hydrophobic) is water fearing contains fatty acids saturated are rigid and unsaturated is flexible

Question 3

Structure

Answer 3

Phospholipids- phosphate group is polar, two fatty acid chains are non polar
Cholesterol
Proteins
Carbohydrates

Question 4

Molecules that can pass through membrane

Answer 4

Oxygen

Carbon dioxide

Question 5

Molecules that can not pass through membrane

Answer 5

Water

Glucose

Question 6

Cholesterol

Answer 6

Helps to give rigidity to strengthen membrane

Question 7

Proteins

Answer 7

Can be in or outside membrane and carry out many functions

Question 8

Protein channels

Answer 8

Used in diffusion

Question 9

Protein pump

Answer 9

Used in active transport

Question 10

Receptor proteins

Answer 10

Accepts certain molecules

Question 11

Marker proteins

Answer 11

Where carbohydrates are attached

Question 12

Carbohydrates

Answer 12

Help in cell recognition so the body can distinguish between foreign substances and acts like a name tag

Called glycocalyx

Question 13

How it maintains structure

Answer 13

Dual natured polarity of phospholipids maintains structure of membrane

Question 14

How is lipid bilayer held together

Answer 14

Polar heads (hydrophilic) are attracted to water both in and outside the cell

Question 15

In phospholipids

Answer 15

One fatty acid chain is saturated is rigid other in unsaturated is flexible

Question 16

Fatty acid tails….

Answer 16

Don’t like water so they hide in the bilayer