2.6-2.7 - Membrane Transport & Facilitated Diffusion

Question 1

Passive transport

Answer 1

Does not require energy
- Moves with a concentration gradient, high to low.

Question 2

Facilitated diffusion

Answer 2

Integral/transport proteins move large & polar molecules through the cell membrane.
- Type of passive transport.

Question 3

Active transport

Answer 3

Requires ATP to force molecules against concentration gradient.
- ATP energizes transport proteins.

Question 4

Endocytosis

Answer 4

When a cell takes in material by forming new vacuoles from the plasma membrane.
- Phagocytosis, receptor-mediated, pinocytosis.

Question 5

Phagocytosis

Answer 5

Cell stretches around substance to ingest it.

Question 6

Receptor-mediated endocytosis

Answer 6

Substances must bind to receptors to get in.

Question 7

Pinocytosis

Answer 7

Cell ingest liquids

Question 8

Exocytosis

Answer 8

• Internal vesicles fuse with plasma membrane & secrete waste.
  Used to get rid of cell waste and allow valuable material to exit.

Question 9

How do large quantities of water pass through the cell membrane?

Answer 9

Aquaporins

Question 10

Which molecules require channel proteins to pass through the membrane?

Answer 10

Charged ions.

Question 11

Membranes may become polarized by movement of ions across membranes

Answer 11

True