osmosis, active transport and diffusion

Question 1

what is osmosis

Answer 1

the movement of molecules from an area of high concentration to low concentration

Question 2

why do leaf cells use osmosis

Answer 2

to make the cell more rigid

Question 3

why can osmosis take place in animal cells

Answer 3

they have no cell wall so can change size and shape

Question 4

what is active transport

Answer 4

substances move from low concentration to high concentration

Question 5

why do root hair cells use active transport

Answer 5

mineral ions are needed for growth and usually the concentration inside the cell is greater than in the soil

Question 6

when does the gut use active transport

Answer 6

when the concentration of nutrients in the gut is lower than the blood

Question 7

what is the concentration gradient

Answer 7

difference between the high and low concentration

Question 8

what is diffusion

Answer 8

movement of particles from an area of high concentration to low concentration

Question 9

how does temperature effect the rate of reaction

Answer 9

increasing gives the particles more energy to move faster

Question 10

how does the surface area of the membrane effect the rate of diffusion

Answer 10

the bigger the surface area the faster the rate of diffusion