Plasma Membrane

Question 1

Glycolipids

Answer 1

act as surface receptors and stabilize the membrane.

Question 2

Proteins

Answer 2

that completely penetrate the membrane control the movement of specific molecules into and out of the cell.

Question 3

Glycoproteins

Answer 3

play an important role in cellular recognition and immune responses. They help stabilise the membrane structure.

Question 4

Cholesterol

Answer 4

a packing molecule and is important in regulating membrane fluidity.

Question 5

Lipid soluble molecules

Answer 5

can move through the membrane by diffusion.

Question 6

Diffusion

Answer 6

describes the movement of particles from regions of high concentration to areas of low concentration down a concentration gradient.

Question 7

Passive transport

Answer 7

doesn’t require energy

Question 8

Simple diffusion

Answer 8

movement of a solute from an area of high concentration to an area of low concentration

Question 9

Facilitated diffusion

Answer 9

refers to diffusion that is assisted by proteins in the membrane

Question 10

Phospholipid

Answer 10

the framework of the cell in which the other components of the cell membrane will be embedded

Question 11

Polar head

Answer 11

hydrophyllic/water loving

Question 12

Non polar tail

Answer 12

hydrophobic/water hating

Question 13

Protein channels

Answer 13

create hydrophilic pores that allow some solutes, usually inorganic ions, to pass through

Question 14

Carrier-mediated facilitated diffusion

Answer 14

larger, lipid-insoluble molecules are aided across the membrane by a transmembrane carrier protein specific to the molecule being transported

Question 15

Osmosis

Answer 15

the diffusion of water from regions of low solute concentration to regions of high solute concentration across a partially permeable membrane

Question 16

Isotonic solution

Answer 16

normal cells

Question 17

Hypotonic solution

Answer 17

swells up/bursts

Question 18

Hypertonic solution

Answer 18

shrivelled cells

Question 19

Active transport

Answer 19

uses energy to move a protein across the plasma membrane

Question 20

Exocytosis

Answer 20

exit/movement of substance out of a cell

Question 21

Endocytosis

Answer 21

enter/movement of substance into a cell

Question 22

Plasma membrane

Answer 22

two layered skin separating the outside and inside of the cell