Modes of transport

Question 1

endocytosis

Answer 1

bulk movement of large molecules into the cell

Question 2

exocytosis

Answer 2

bulk movement of large molecules out of the cell

Question 3

passive

Answer 3

no energy requiredfi

Question 4

diffusion

Answer 4

net movement of particles from a high concentration to a low concentration, down a concentration gradient

Question 5

osmosis

Answer 5

net movement of water molecules from a high concentration, through a partially permeable membrane, to a low concentration

Question 6

facilitated diffusion

Answer 6

net movement of particles from a high concentration to a low concentration, down a concentration gradient, through a protein channel/ carrier

Question 7

active

Answer 7

requires energy

Question 8

active transport

Answer 8

net movement of particles from a low concentration, toa high concentration . against the concentration gradient using ATP and a protien pump

Question 9

SIMPLE DIFFUSION examples

Answer 9

FAT SOLUBLE, SMALL, VITAMINS, NON-CHARGED

Question 10

CHANNEL MEDIATED FACILITATED DIFFUSION examples

Answer 10

IONS, WATER

Question 11

CARRIER MEDIATED FACILITATED DIFFUSION examples

Answer 11

POLAR MOLECULES, LARGE, SUGAR, AMINO ACIDS
- LEAK CHANNELS = always open

Question 12

CHEMICAL/LIGAND GATED CHANNELS

Answer 12

Responds when a chemical such as a NT binds to it

Question 13

VOLTAGE GATED CHANNELS

Answer 13

Opens in response to a change in membrane potential.

Question 14

MECHANICAL GATED CHANNELS

Answer 14

Opens in response to physical deformation, e.g.,touch.

Question 15

OSMOLARITY

Answer 15

The total number of solute particles present in 1L of solution. (e.g., the osmolarity of a solution of NaCl at 300 mmol/L is 600 mmol/L

Question 16

HYPERTONIC

Answer 16

The solution has a higher number of molecules than in the cell.
Water moves out of the cell causing it to shrink

Question 17

HYPOTONIC

Answer 17

The solution has a lower number of molecules than in the cell.
Water moves into the cell causing it to swell

Question 18

ISOTONIC

Answer 18

The solution and the cell have an equal number of molecules.

Question 19

TONICITY

Answer 19

the ability to change the shape or tone of cells by altering the cells internal water volume

Question 20

leak channels

Answer 20

• always open
• allow ions or water to move according to concentration gradient