active transport DEFINITELY IN EXAM

Question 1

define active transport

Answer 1

the movement of particles from a low to high concentration

against a concentration gradient

Question 2

where is the energy for active transport from

Answer 2

respiration

Question 3

how does active transport allow the movement of plant ions

Answer 3

active transport allows mineral ions to be absorbed into plant’s root hairs from dilute solutions in the soil. Plants require ions for healthy growth

Question 4

how does active transport allow the movement of sugar molecules

Answer 4

active transport allows sugar molecules to absorbed from lower concentrations in the gut into the blood which has a higher sugar concentration

Question 5

what are the differences between active transport and diffusion

Answer 5

• in diffusion particles move down the concentration gradient
  in active transport particles move against the concentration gradient
• diffusion doesn’t require energy from respiration whereas active transport does

Question 6

why do root hair cells have a lot of mitochondria

Answer 6

to provide the energy required to do respiration which then provides the energy needed to do active transport