Cell membrane

Question 0

what is the structure of a cell membrane?

Answer 0

2 layers of phospholipids (phospholipid bilayer)

Question 1

what is the outside of the cell that supports it and controls what enters and leaves the cell?

Answer 1

the cell membrane

Question 2

describe the phospholipid bilayer of cell membranes

Answer 2

the head is polar (water loving) the tail is non-polar (water hating)

Question 3

three types of passive transport

Answer 3

diffusion, facilitated diffusion and osmosis

Question 4

three types of active transport

Answer 4

protein pumps, endocytosis, exocytosis

Question 5

which kind of transport spreads from high to low concentration (goes with the concentration gradient) and uses no energy?

Answer 5

passive transport

Question 6

particles moving from Hugh to low concentration until equilibrium is reached and particles are evenly spaced is called what?

Answer 6

diffusion

Question 7

diffusion with the help of transport proteins found in the membrane which are selectively permeable is called what?

Answer 7

facilitated diffusion

Question 8

the diffusion of water through a highly selectively permeable membrane, from high to low concentration is called what?

Answer 8

osmosis

Question 9

osmosis causes cells to shrink and grow (and burst) as water exits and enters the cell. true or false?

Answer 9

true

Question 10

which kind of transport goes from low to high concentration (against the concentration gradient) and requires energy?

Answer 10

active transport

Question 11

transport proteins that require energy to do work

Answer 11

protein pumps

Question 12

when the cell membrane folds around particle and consumes/ engulfs it to take it into the cell

Answer 12

endocytosis

Question 13

cell changes shape (cell membrane opens) to force a particle out of the cell

Answer 13

exocytosis

Question 14

hypertonic solutions

Answer 14

have higher concentrations outside the cell and the water spreads out wards to balance the solution

Question 15

isotonic solutions

Answer 15

have equal concentrations outside and inside the cell

Question 16

hypotonic solutions

Answer 16

have higher concentrations inside the cell and the water spreads inwards to balance the solution