active transport

Question 1

how do root hair cells take in minerals and water

Answer 1

1)plants are covered in root hair cells
2) the stick out into the soil
3) hairs give roots large surface area
4) useful for absorbing water and mineral ions from soil

Question 2

how do root hairs take in minerals using active transport

Answer 2

the concentration of minerals is usually higher in root hair cells than in the soil

so root hair cells can’t use diffusion to take up minerals

they use active transport instead
AT moves minerals against the concentration gradient

BUT AT needs energy from respiration to make it work

Question 3

why do we need AT to stop us starving

Answer 3

the body needs to absorb nutrients from food to survive

Question 4

how does AT stop us from dying

Answer 4

nutrients move from gut to the blood

when there’s a HC of nutrients in the gut they diffuse into the blood

when there’s a LC of nutrients in the gut the body uses AT to move the nutrient from a LC to a HC in the blood