Cell Transports

Question 1

Diffusion / passive transport

Answer 1

movement of molecules from regions of high concentration to low concentration. Molecules move across the concentration gradient if they are small and nonpolar

Question 2

Require energy? (diffusion)

Answer 2

It doesn’t require energy

Question 3

Equilibrium

Answer 3

when the net concentration of molecules on each side of the membrane is equal

Question 4

Osmosis

Answer 4

the movement of water molecules from a region of low solute concentration to a region of high solute concentration

Question 5

Facilitated diffusion

Answer 5

Occurs when a substance is aided across a membrane by a protein channel

Question 6

Require energy? (facilitated diffusion)

Answer 6

it doesn’t require energy as the molecules aren’t moving against their concentration gradient

Question 7

Active transport

Answer 7

the movement of substances from a region of lower concentration to a region of higher concentration

Question 8

Require energy? (active transport)

Answer 8

energy is required as movement is against a concentration gradient

Question 9

Endocytosis

Answer 9

incorporation of substances from outside the cell into the cell as membrane-bound vesicles

Question 10

3 forms of endocytosis

Answer 10

phagocytosis, pinocytosis, recpetor mediated

Question 11

Phagocytosis

Answer 11

engulfment of solid molecules

Question 12

Pinocytosis

Answer 12

engulfment of liquid particles

Question 13

Receptor mediated

Answer 13

engulfment of specific particles according to membrane receptors

Question 14

Exocytosis

Answer 14

releases substances from the inside of the cell to the outside of the cell.

Question 15

How does exocytosis occur?

Answer 15

by fusion of a vesicle membrane with the plasma membrane. The vesicle contents are then released to outside the cell.

Question 16

Channel protein

Answer 16

Small polar molecules and ions diffuse

Question 17

Carrier protein

Answer 17

Larger molecules diffuse

Question 18

Hypotonic solution

Answer 18

a solution with low solute concentration.

Question 19

Isotonic solution

Answer 19

a solution with the same solute concentration as that one of the solution at the other side of a membrane.

Question 20

Hypertonic solution

Answer 20

a solution with a high solute concentration.

Question 21

Plant cells in hypertonic solution

Answer 21

water will move out of the cell due to osmosis, causing the cell to shrink and the cell membrane to pull away from the cell wall. This process is called plasmolysis, and the cell becomes flaccid.