co transport of amino acids and monosaccharides

Question 1

When does co-transport need to happen?

Answer 1

When the concentration of monosaccharides or amino acids increases above that in the lumen.

Question 2

What is the first step of co-transport?

Answer 2

Sodium ions are actively transported out of epithelial cells and into the blood.

Question 3

What does co-transport require?

Answer 3

Carrier protein and ATP

Question 4

What does co-transport ensure?

Answer 4

That there is a low concentration of sodium ions in the epithelial cell

Question 5

What does this mean for the concentration of sodium ions in the lumen?

Answer 5

There is a higher concentration in the lumen

Question 6

What has been created for sodium ions?

Answer 6

A concentration gradient

Question 7

What will happen to the sodium ions in the lumen?

Answer 7

They will diffuse into the epithelial cell through a carrier protein called a co-transport protein, glucose will move through these proteins with the sodium ions

Question 8

What is the final step of co-transport?

Answer 8

The glucose molecules will move out the cell into a capillary through facilitated diffusion through a channel or carrier protein