4.1.3.3 Active Transport

Question 1

What is active transport?

Answer 1

• the movement of substances from a lower concentration to a higher concentration using energy from respiration

Question 2

Why can’t root hair cells take in minerals by diffusion?

Answer 2

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

Question 3

What does active transport allow?

Answer 3

• allows the plant to absorb minerals from a dilute solution, against a concentration gradient

Question 4

Where is active transport used in a human?

Answer 4

• in the gut where there is a lower concentration of nutrients in the gut but a higher concentration of nutrients in the blood

Question 5

What happens when there is a higher concentration of glucose and amino acids?

Answer 5

• they diffuse naturally into the blood