Active transport

Question 1

What is Active transport?

Answer 1

The movement of particles against the concentration gradient using energy/ATP involving carrier proteins

Question 2

What do protein carriers do?

Answer 2

Change their shape to transport (or exchange) substances acrosss a membrane

Question 3

What is conformational change?

Answer 3

Structural/shape change

Question 4

What is bulk transport?

Answer 4

Active transport of large molecules

Question 5

What is endocytosis?

Answer 5

The bulk transport of molecules, too large to pass through a cell membrane even via channel or carrier proteins, into a cell
Phagocytosis = solids
Pinocytosis = liquids

Question 6

What is exocytosis?

Answer 6

The bulk transport of molecules, too large to pass through a cell membrane even via channel or carrier proteins, out of a cell

involves the fusion of vesicles with plasma membrane

Question 7

What is the process of active transport?

Answer 7

1. The sodium potassium pump binds three sodium ions and a molecule of ATP
2. The splitting of ATP provides energy to change the shape of the channel. The sodium ions are driven through the channel
3. The sodium ions are released to the outside of the membrane, and the new shape of the channel allows two potassium ions to bind
4. Release of the phosphate allows the channel to revert to its original form, releasing the potassium ions on the inside of the membrane