endocytosis + exocytosis worksheet

Question 1

the energy-requiring movement of substances across a biological membrane against a concentration gradient

Answer 1

active transport

Question 2

protein channel that increases the diffusion rate of water through the plasma membrane

Answer 2

aquaporin

Question 2

protein in the plasma membrane that facilitates the diffusion of a specific lipid insoluble molecule

Answer 2

carrier protein

Question 3

a structure, present in plants and bacteria, which is found outside the plasma membrane and gives rigidity to the cell

Answer 3

cell wall

Question 4

protein that provides a channel through the plasma membrane for small polar molecules and ions

Answer 4

channel protein

Question 5

the gradual difference in the concentration of solutes as a function of distance through the solution

Answer 5

concentration gradient

Question 6

the passive movement of molecules from high to low concentration

Answer 6

diffusion

Question 7

active transport in which molecules are engulfed by the plasma membrane, forming a phagosome or food vacuole within the cell

Answer 7

endocytosis

Question 8

active transport process by which membrane-bound secretory vesicles fuse with the plasma membrane and release the vesicle contents into the external environment

Answer 8

exocytosis

Question 9

a type of passive transport facilitated by transport proteins

Answer 9

facilitated diffusion

Question 10

the model for membrane structure which proposes a double phospholipid bilayer in which proteins and cholesterol are embedded

Answer 10

fluid mosaic model

Question 11

lipids with attached carbohydrates which serve as markers for cellular recognition

Answer 11

glycolipids

Question 12

membrane-bound proteins with attached carbohydrates, involved in cell to cell interactions

Answer 12

glycoproteins

Question 13

a solution with higher solute concentration relative to another solution (across a membrane)

Answer 13

hypertonic

Question 14

a solution with lower solute concentration relative to another solution (across a membrane)

Answer 14

hypotonic

Question 15

a transmembrane protein that moves ions across a plasma membrane for small polar molecules and ions

Answer 15

ion pump

Question 16

solutions of equal solute concentration

Answer 16

isotonic

Question 17

passive movement of water molecules across a selectively permeable membrane down a concentration gradient

Answer 17

osmosis

Question 18

movement of substances across a biological membrane without energy expenditure

Answer 18

passive transport

Question 19

a specific form of endocytosis involving the engulfment of solid particles by the plasma membrane

Answer 19

phagocytosis

Question 20

the uptake of liquids or fine suspensions by endocytosis

Answer 20

pinocytosis

Question 21

a selectively permeable phospholipid bilayer forming the boundary of all cells

Answer 21

plasma membrane

Question 22

the process in plant cells where the plasma membrane pulls away from the cell wall as a result of the loss of water through osmosis

Answer 22

plasmolysis

Question 23

a membrane that acts selectively to allow some substances, but not others, to pass

Answer 23

selectively permeable

Question 24

protein that spans the plasma membrane

Answer 24

transmembrane protein

Question 25

the force exerted outward on a plant cell wall by the water contained in the cell

Answer 25

turgor