osmosis]

Question 1

what is the diffrence between diffussion and osmosis

Answer 1

diffusion is the movement down a diffusion gradient, osmosis is the balancing of the tonicity of a solution

Question 2

what causes osmosis pressure in a cell

Answer 2

the semi permiable membrane enableing the transfer of water but not ions in the solution

Question 3

describe:
isotonic
hypertonic
hypotonic

Answer 3

isotonic is when both sides of a membrane have the same concentration of solutes
hypertonic is when there is more solutes in the solution
hypotonic is when there is less solutes in the solution

Question 4

how does a hypotonic solution introduced to the body effect a cells

Answer 4

the ECF tonicity < ICF tonicity
osmosis will push water into the cell to balance both sides tonicity
cell will swell

Question 4

what is toncitiy

Answer 4

toncitiy is the concentration of a solute in a solution

Question 5

how does a hypertonic solution introduced to the body effect a cell

Answer 5

the ICF tonicity < ECF tonicity
osmosis will push water out of the cell to ‘concentrate’ the solutes in the cell to balance
cell will shrink

Question 6

diffrence between electrical and chemical gradients

Answer 6

electrical change in the charge over an are
chemical change in the change in concentration of ions

Question 6

how do K and Na concentrations inside and outside the plasma membrane change

Answer 6

K is higher concentration inside the cell and K is lower concentration ouside the cell

Na is higher concentration outside the cell
Na is lower concentration inside the cell

Question 7

how do cells send rapid signeling into the cell

Answer 7

when signals open chanel proteins then Na rushes into the cell and K rushes out, Na is faster casing the inside of the cell to become

Question 8

what is depolarization

Answer 8

depolarization is the decrease in an electrical gradient. like when more Na rushes in to the cell than K rushes out causing inside to become more +ve and outside to become more -Ve depolarising the membrane.

Question 8

what is repolarization

Answer 8

repolarisation is when an electrical gradient is restored. when the NA K pump brings less K into the cell than Na pumped out, cause the electric gradient to increase back to its origin

Question 9

describe sodium potasium signaling

Answer 9

Na rushes into the cell powered by the electric and cemical gradients
K moves out of the cell powered by chemical gradient, slowed by invese electric gradient

overall depolarizing which sends a signal
to repolarise Na K pump psuhes 3 Na out of the cell and brings in 2K. restores both equilibriums