Cellular Transport

Question 1

What two molecules make up the cell membrane

Answer 1

phospolipids (lipid bilayer), cholestorol, proteins

Question 2

what is meant that the cell membrane is selectively permeable

Answer 2

some substances can pass through while others can’t

Question 3

What would happen if the cholesterol molecules were removed from the cell membrane

Answer 3

the fatty acid tails would stick together and anything could pass through

Question 4

What is the function of the carbohydrate chain

Answer 4

helps identify chemical signals (communication)

Question 5

how do the properties of lipids help explain the structure of the cell membane

Answer 5

the heads love water while the tails hate water

tails (hydrophobic) heads (hydrophilic)

Question 6

why is the cell membrane somethimes referred to as a fluid mosaic

Answer 6

the lipids move side to side while the proteins move up and down. bc the pattern is always changing

Question 7

list two differences between a hypotonic vs a hypertonic environment for a cell

Answer 7

hypo-swell, more solute in,water in

hyper- shrink, more solute out, water out

Question 8

how does the rate of molecules change across the cell membrane with the temp increased

Answer 8

speeds up (increase)

Question 9

the word hypertonic means more water in the cells environment or more solute

Answer 9

more solute

Question 10

what is the relationship between diffusion and osmosis

Answer 10

h to l, (passive), spread molecules

Question 11

what is the usual method the cell membrane uses to get glucose across

Answer 11

facilitated diffusion

Question 12

concentration gradient

Answer 12

energy, gradual level, with or against, moving, fluid,

against (kids running up while you walk down)

Question 13

why do raisins plump up more quickly in hot water than cold water

Answer 13

molecules diffuse faster at a higher temp, hypotonic environment

Question 14

why is drinking salt water so dangerous

Answer 14

hypertonic, dehydrate, water out

Question 15

Why does oxygen and carbon dioxide pass in and out of the cell membrane so easily

Answer 15

very small particles and can fit easily through the pores

Question 16

Compare diffusion to facilitated diffusion

Answer 16

H to l (passive) f uses a transport protein

Question 17

Explain when dynamic equilibrium ( homeostasis) is reached in a cell

Answer 17

When there is the same amount of solute in and out of the cells environment (isotonic) , temp, heart beat

Question 18

Explain how concentration gradient affects the movement of molecules

Answer 18

w/- passive

against- active

Question 19

Explain what happens to grass cells when too much fertilizer is used on a lawn of grass

Answer 19

hypertonic

Question 20

Explain what would happen if you place a slice of potato in salt water

Answer 20

shrivel, hypertonic

Question 21

Compare passive and active transport

Answer 21

transport materials across the cell

Question 22

Contrast passive and active transport (passive)

Answer 22

No energy
Facilitated diffusion
Osmosis
Diffusion
With concentration gradient
High to low
Hypotonic
Hypertonic

Question 23

Contrast passive and active transport (active)

Answer 23

Energy
Endocytosis
Exocytosis
Protein pump
Against concentration gradient
Low to high

Question 24

Compare facilitated diffusion vs active transport by a protein pump

Answer 24

both uses a transport protein

Question 25

what is simuliar between hypertonic and hypotonic

Answer 25

type of cellular transportation, not an equalibrium, uses solute and water