active transport

Question 1

What is active transport?

Answer 1

Active transport moves substances from a more dilute solution to a more concentrated solution (against a concentration gradient).

Question 2

What is required for active transport to be able to take place?

Answer 2

This requires energy from respiration.

Question 3

How is active transport useful in plants?

Answer 3

Active transport allows mineral ions to be absorbed into plant root hairs from very dilute solutions in the soil, against a concentration gradient using energy from respiration.

Question 4

Why do plants require ions?

Answer 4

Plants require ions for healthy growth.

Question 5

How is active transport useful in humans?

Answer 5

It also allows sugar molecules to be absorbed from lower concentrations in the gut and from the kidney tubes into the blood which has a higher sugar concentration. Sugar molecules are used for cell respiration.

Question 6

What are sugar molecules needed for in humans?

Answer 6

Sugar molecules are used for cell respiration.

Question 7

Why is active transport needed in the gut?

Answer 7

Sometimes there’s a higher concentration of nutrients in the blood than in the gut so active transport is needed in that case to ensure that the nutrients move out of the gut into the bloodstream and not the other way around.

Question 8

Why does this need to happen?

Answer 8

Glucose is needed for respiration.

Question 9

What is the function of the root hair cell?

Answer 9

To absorb water and mineral ions from the soil.

Question 10

How is the root hair cell adapted for its function?

Answer 10

.Add larger SA for roots
. lots mitochondria - need for active transport
.use active transport to absorb water and mineral ions