unit 4: Plasma Membrane/ cell membrane

Question 1

balanced internal condition of cells

Answer 1

homeostasis

Question 2

only allows certain substances at certain times, in certain amounts into and out of the cell

Answer 2

selective permeability

Question 3

requires NO energy to move things across the cell membrane. Molecules move easier through the membrane

Answer 3

passive transport

Question 4

the diffusion of water across a cell membrane

Answer 4

osmosis

Question 5

a type of passive transport because energy is not required

Answer 5

facilitated diffusion

Question 6

intergal proteins; have a pore always open for materials to cross.

Answer 6

channel protein

Question 7

moving particles from high to low

Answer 7

concentration gradient

Question 8

transport required additional energy to move materials.

Answer 8

active transport

Question 9

taking in large droplets is called ____ or “ cell drinking”

Answer 9

pinocytosis

Question 10

a small fluid filled thing

Answer 10

vesicle

Question 11

” cell eating” is known as _____. this is the taking in of food and other solid particles.

Answer 11

phagocytosis

Question 12

concentration is lower, cell will swell and burst

Answer 12

hypotonic solution

Question 13

concentration is higher, the cell is going to shrink and shrivel

Answer 13

hypertonic solution

Question 14

concentrations are the same, its going to stay the same.

Answer 14

isotonic solution

Question 15

what does it mean to go “ down” a concentration gradient

Answer 15

to go from high to low to low to high concentration

Question 16

what are the 2 functions of the plasma membrane

Answer 16

to act as a protective barrier
to regulate transport in and out of the cell

Question 17

what molecule is used as the energy source for active transport

Answer 17

ATP

Question 17

what are the examples of active transport

Answer 17

• endocytosis
• exocytosis
• pinocytosis
• phagocytosis
• receptor- mediated
• sodium potassium pump
• bulk transport

Question 18

what are the examples of passive transport

Answer 18

• simple diffusion
• osmosis
• facilitated diffusion

Question 18

what is the plasma membrane made of? what is the main component?

Answer 18

phospholipids and proteins

Question 19

what part of the cell makes the energy that is needed for active transport

Answer 19

mitochondria

Question 20

what will happen to a cell when placed in a hypotonic solution?

Answer 20

it will swell and burst

Question 20

what will happen to a cell when placed in a hypertonic solution?

Answer 20

it will shrink and shrivel

Question 21

what will happen to a cell when placed in a isotonic solution?

Answer 21

it will stay the same