co transport

Question 1

step 1

Answer 1

sodium ions are actively transported out of the epithelial cell into the blood
(there must be a higher conc of glucose in ilysm compared to epithelial cell)

Question 2

step 2

Answer 2

because there is usually more glucose in epithelial cell, this reduces the sodium ion conc in the epithelial cell

Question 3

step 3

Answer 3

sodium ions can diffuse from lumen into epithelial cell

Question 4

step 4

Answer 4

the protein that the sodium ions diffuse through is a co transporter protein

glucose and amino acids attach and transports into the epithelial cell against a conc gradient

Question 5

microvilli

Answer 5

increase the surface area on the epithelial cell for the co transporter proteins