Active Transport + Cotransport

Question 1

Active transport

Answer 1

Uses carrier protein
Against a conc gradient
Requires energy from ATP

Question 2

Cotransport

Answer 2

Carrier proteins transport more then one molecule at a time
Eg
High conc of sodium going through membrane is driving force and goes through facilitated diffusion
Low conc of glucose goes through active transport but passively

Question 3

Process of uptake of glucose or amino acids from ileum into blood stream

Answer 3

Active transport of sodium into blood (provides sodium conc gradient)
Cotransport of glucose and sodium from lumen into ileum epithelial cells
Facilitated diffusion of glucose into blood