membrane transport- lqc 3

Question 1

is diffusion passive or active

Answer 1

passive

Question 2

diffusion

Answer 2

Movement from a region of high concentration to a region of low concentration ( down a concentration gradient). Continues until equilibrium is reached.

Question 3

is facilitated diffusion active or passive

Answer 3

passive

Question 4

facilitated diffusion

Answer 4

Movement from a region of high concentration to a region of low concentration ( down a concentration gradient through carrier or channel proteins. Movement can be in either direction but is dependent on concentration

Question 5

is osmosis passive or active

Answer 5

passive

Question 6

osmosis

Answer 6

Net movement of free water molecules from a solution with a low concentration of solute to a solution with a high concentration of solute through a partially permeable membrane.

Question 7

is active transport passive or active

Answer 7

active

Question 8

active transport

Answer 8

Movement from a region of low concentration of the substance to a region of high concentration against a concentration gradient through a carrier protein, using ATP

Question 9

is exocytosis active or passive

Answer 9

active

Question 10

exocytosis

Answer 10

Bulk transport out of a cell. A membrane-bound vesicle, with the substance inside, fuses with the cell membrane and the vesicle membrane becomes part of the cell membrane, releasing the substance. Relies on the fluid nature of the cell membrane.

Question 11

is endocytosis active or passive

Answer 11

active

Question 12

endocytosis

Answer 12

Bulk transport into a cell. Sometimes the substance attaches to a receptor on the membrane. The cell membrane invaginates (bulges inwards) to form a vesicle which pinches off, enclosing the solid or liquid material. Relies on the fluid nature of the membrane.