transport

Question 1

cells need what to stay alive

Answer 1

gradients

Question 2

diffusion

Answer 2

movement of moleucles form high concentration to low (spontaneously)

Question 3

rate of diffusion depends on

Answer 3

extent of gradient charge
mass of molecules diffusion
temp
solvent density
solubility
surfce area/ plasma membrane thickness
distance traveled

Question 4

osmosis

Answer 4

movement of water from low solute concentration to high thru a semipermeable membrane

Question 5

hypertonic

Answer 5

high solute concentration

Question 6

isotonic solution

Answer 6

balaneced solution

Question 7

hypotonic solution

Answer 7

low solute concentration

Question 8

turgor pressure

Answer 8

(plant) using the vacule full up water to push membrane again the cell wall

Question 9

passve transport

Answer 9

movemnt thru membrane that requires no energy
uses concentration gradient

Question 10

channels

Answer 10

allows free passage of ions

Question 11

gated channels

Answer 11

opened/close in repsonce to stimulus

Question 12

carrier protien

Answer 12

movement is specific
shit docks with each other

Question 14

active transport

Answer 14

needs energy (ATP)
moves stuff agasint the gradient
low to high
needs carrier protiens

Question 15

uniporters

Answer 15

move one molecule at a time

Question 16

symporters

Answer 16

move 2 typa thing in same direction

Question 17

antiporters

Answer 17

moves 2 types in diff directions of eachother

Question 18

sodium potassium pump

Answer 18

antiporter to move 3 NA out of cell and 3 K into cell
(both against gradients)
(needs ATP)

Question 19

glucose NA symporter

Answer 19

captures energy from NA diffusion to move against a concentration
(tied to ATP to make NA gradient)

Question 20

bulk transport

Answer 20

material gets encapsulateed into vesicle
requires energy

Question 21

endocytocis

Answer 21

movement of stuff into the cell

Question 22

exocytosis

Answer 22

materialis discharged from cell
vessicle fuse with cell

Question 23

exocytocis use in animals

Answer 23

to secrete hormones, neruotransmitters, digestive enzymes

Question 24

Na+ channel opening signal what

Answer 24

a nerve impulse

Question 25

directional propagation is formed on what basis

Answer 25

the swtiching bn an active channel, its activation, and re-closure

Question 26

how is membrane potential kept formal

Answer 26

opening potassium channels shortly after opening sodium channels

Question 27

repolarization

Answer 27

restoring Na/K concentrations

Question 28

nodes of ranvier are laoded with -

Answer 28

sodium and potassium