Role of cell membrane

Question 1

What is the cell membrane?

Answer 1

Semi-permeable barrier separating the intracellular and
extracellular environments

Question 2

What are the components of the cell membrane ?

Answer 2

phospholipids and proteins

Question 3

Membrane Proteins
make up about 50% of the membrane’s mass. There are 2 types

Answer 3

• Integral Proteins &
  -Peripheral Proteins

Question 4

Integral proteins are firmly inserted into the

Answer 4

lipid bilayer

Question 5

all membrane proteins contain two regions

Answer 5

hydrophobic
hydrophilic

Question 6

Most integral proteins are involved with

Answer 6

transport

Question 7

Peripheral proteins are loosely attached to integral proteins and are easily detached. They serves as

Answer 7

-Enzymes
- Motor functions (movement)
-Link cells together (junctions)

Question 8

What is the cell membrane’s most important function is to

Answer 8

select what goes in and out of the cell

Question 9

What are the two types of transport at work

Answer 9

passive and active

Question 10

Passive tranport requires

Answer 10

No energy (ATP)

Question 11

How to substances move in passive transport

Answer 11

high concentration to low concentration

Question 12

What are substances influenced by?

Answer 12

Temperature
Concentration
Distance

Question 13

what are the 3 types of passive transport

Answer 13

Simple diffusion
Faciliated diffusion
Osmosis