membrane transport

Question 1

carrier mediated transport

Answer 1

particular substance binds with transport protein to pass

Question 2

cotransport

Answer 2

simporter. two substances attach to enter

Question 3

counter-transport

Answer 3

antiporter. two substances bind to protein. one enters and one exits

Question 4

facilitated diffusion

Answer 4

compound binds to receptor site and carrier protein > to < to let compound into cell

Question 5

bulk flow

Answer 5

large groups of molecules diffuse at once (i.e. osmosis)

Question 6

filtration

Answer 6

molecules move thru porous membrane due to pressure gradient (i.e. capillaries)

Question 7

active transport

Answer 7

high energy - consumes ATP. does not need concentration gradient

Question 8

ion pumps

Answer 8

carrier proteins that move cations Na, K, Ca2, & Mg2

Question 9

secondary active transport

Answer 9

moving substances along a concentration gradient, allowing for substance w/o conc. grad. to “come along for the ride”

Question 10

sodium potassium exchange pump

Answer 10

exchange intracellular Na ions for extracellular K ions. 3Na = 2K. leak channels

Question 11

vesicular transport

Answer 11

large material moves into or out of cells in membranous vesicles. bulk transport.

Question 12

endocytosis

Answer 12

extracellular material packaged in vesicles at cell surface and moved inside

Question 13

exocytosis

Answer 13

vesicle forms inside the cell and fuses with membrane. released outside

Question 14

receptor mediated endocytosis

Answer 14

highly selective. vesicles contain specific molecules in high concentration

Question 15

pinocytosis

Answer 15

endosomes filled with extracellular fluid fuse with membrane and pinch off.

Question 16

phagocytosis

Answer 16

endosomes containing solid objects connect with enzymes to digest contents. get rid of debris.