biology

Question 1

how do substances move in and out of cells across the membrane?

Answer 1

by difussion

Question 2

name a factor which will affect the rate of difussion?

Answer 2

• the difference in concentration
• the temperature
• the surface area of the membrane

Question 3

what is osmosis?

Answer 3

difusion of water from a dilute soloution to a concentrated soloution through a partially permable membrane

Question 4

how do u work out the rate of osmosis?

Answer 4

rate is a change divided by a time period