Active Transport

Question 1

What is active transport

Answer 1

The movement of substances from a low to high concentration using metabolic energy and carrier proteins

Question 2

Through what is active transport carrier out in

Answer 2

Carrier proteins

Question 3

What is the process of active transport like the sodium potassium pump

Answer 3

-Molecules bind to receptor complementary (only molecules that are complementary to carrier protein can bind to it ) in shape on the proteins
-ATP binds to the carrier proteins from inside of the cell and its hydrolysed into ADP+Pi
-This causes carrier protein to change shape and release molecules to the other side
-Phosphate ion is then released and the protein returns to its original shape

Question 4

What is the process of co transport of glucose and sodium ions in the Iluem

Answer 4

• Sodium ions are actively transported ( requires atp) out of the epithelial cells into the blood
  -This reduces sodium ion concentration in the epithelial cell
  -Sodium ions can diffuse from lumen down their concentration gradient into the epithelial
  -The protein sodium ions diffuse through is a co transporter protein so glucose attach and are also transported into the epithelial cell against the concentration gradient
  -Glucose then moves by facilitated diffusion from epithelial cell to the blood cell