Active Transport Across Membranes

Question 1

Define active transport

Answer 1

requires energy (ATP) , against concentration gradient to move substances from low to high and requires the use of highly selective carrier proteins

Question 2

Uniporter

Answer 2

move one molecule at a time

Question 3

Symporter

Answer 3

move two molecules in the same direction

Question 4

Antiporter

Answer 4

move two molecules in opposite directions

Question 5

Describe the function of the sodium-potassium pump.(3Na to 2 K

Answer 5

Direct use of ATP for active transport

Question 6

Antiporter moves…

Answer 6

3 Na+ out of the cell
2 K+ into the cell
Against their concentration gradient

Question 7

What does ATP have to with the sodium-potassium pump?

Answer 7

ATP energy changes conformation of carrier protein