Active Transport

Question 1

Active transport

Answer 1

the movement of molecules from an area of low concentration to an area of high concentration

against the concentration gradient

Question 2

What is required for active transport

Answer 2

It requires a carrier protein

Energy

ATP

Question 3

What does a carrier protein do

Answer 3

this helps move large molecules to the other side of the membrane

Question 4

How do carrier proteins help move things to the other side pf the membrane

Answer 4

it does this by attaching to a molecule and then the carrier protein changes shape and releases the molecule to the opposite side

Question 5

Why is active transport an active process

Answer 5

Requires ATP made in mitochondria

Question 6

How is atp used in active transport

Answer 6

atp is hydrolysed by atp hydrolyse into adp and Pi ( inorganic phosphate )

the energy released can be used to transport the solutes

Question 7

Factors affecting the rate of active transport

Answer 7

the number of carrier proteins available

The speed of individual carrier proteins

The rate of respiration in the cell and the availability of atp

Question 8

Co transport

Answer 8

co transports is a type of carrier protein and transports 2 molecules at the same time as it binds to two molecules

Question 9

How does co transport work?

Answer 9

It uses the concentration gradient of one molecule to move the other molecule against it’s own concentration gradient

an example is the co transport of sodium ions and glucose

Question 10

Where is glucose absorbed to?

Answer 10

Glucose absorbed by co transport In the mammalian ileum

Question 11

How is glucose absorbed by co transport In the mammalian ileum

Answer 11

glucose is absorbed into the bloodstream in the small intestine

In in the ileum the concentration of glucose is too low for glucose to diffuse out into the blood

So glucose is absorbed from the lumen of the ileum by co transport