B1.9 active transport

Question 1

what is active transport

Answer 1

when substances to move from an area of low concentration to an area of high concentration through a partially permiable membrane AGAINST the concentration gradient

Question 2

what does active transport require

Answer 2

energy from respiration

Question 3

why do cells involved in a lot of active transport have lots of mitochondria

Answer 3

so lots of respiration can take place and lots of energy can be released

Question 4

why is active transport important in plant roots

Answer 4

mineral ions can be absorbed into plant root hair cells from very dilute solutions in the soil

Question 5

why do plants need mineral ions

Answer 5

for healthy growth

Question 6

how is active transport used in the gut

Answer 6

sugar molecules can be absorbed from lower concentrations in the gut into the blood which has a higher sugar concentration

Question 7

what are sugar molecules used for

Answer 7

cell respiration