Movement of subtances in and out of cells

Question 1

what is diffusion

Answer 1

the net movement of particles from an area of higher concentration to an area of lower concentration.

Question 2

what is osmosis

Answer 2

the net movement of water molecules across a partially permeable membrane from a region of higher water concentration to a region of lower concentration.

Question 3

describe a diffusion Experiment

Answer 3

you can now investigate the rate of diffusion by using different-sized cubes of agar jelly, seeing how long it takes for each cube to go colourless

Question 4

describe a living Osmosis Experiment

Answer 4

Question 5

describe a non living Osmosis experiment

Answer 5

Question 6

What is active transport

Answer 6

movement of particles against the concentration gradient, using energy released during respiration.

Question 7

How do you calculate SA: V

Answer 7

Question 8

how does distance affect the movement of substances?

Answer 8

if substances have a short distance to move, then they’ll move in and out of cells faster.

Question 9

how does temperature affect the movement of cells?

Answer 9

as the particles in a substance get warmer they have more energy - so they move faster. this means as temperature increases, substances move in and out of cells faster.

Question 10

how does the concentration gradient affect the movement in and out of cells.

Answer 10

the bigger the concentration gap the faster diffusion/osmosis