CO-transport and absorption of glucose in the ileum

Question 1

Increase the rate of movement across membranes
microvilli

Answer 1

Microvilli
-Provide a higher surface area for more carrier protiens
-Increase the number of protein channels and carrier protiens

Question 2

The role of diffusion in absorbtion
Glucose in blood

Answer 2

When carbohydrates and proteins are being digested, there is a higher concentration of it in the ileum than in the blood
Due to circulation, the glucose absorbed by blood is removed in cells and used up in respiration.

Question 3

Roles of active transport in absorption
Glucose absorption

Answer 3

Diffusion mainly results in the concentration gradient between two sides becoming =.
∴, not all the glucose needed is absorbed and gets passed out.
Because of this, active transport also carries out transport. So all the glucose is absorbed

Question 4

Co-transport

Answer 4

Coupled transport of molecules across a cell membrane
Glucose and amino acids are absorbed along with sodium ions that are taken out of the epithelium by the sodium-potassium pump