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biology 10 > Membrane Transport > Flashcards

Membrane Transport Flashcards

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AP® Biology flashcards
1
Q

composed of phospholipids and proteins

A

cell membrane

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2
Q

arrangement of phospholipids (name)

A

phospholipid bilayer

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3
Q

cell membrane fluid/rigid

A

fluid

components drift past one another

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4
Q

cell membrane function

A

retains cell contents

regulates material movement into/out of cell

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5
Q

selective barrier

A

cell membrane

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6
Q

proteins embedded in membrane

A

membrane proteins

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7
Q

types of transport proteins

A

channel protein

membrane pumps

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8
Q

diffusion of small molecules and ions is function of …

A

channel protein

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9
Q

… function is active transport of particles

A

membrane pumps

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10
Q

speed up chemical reactions

A

enzymes

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11
Q

… function is attachment of hormones

A

hormone receptor site

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12
Q

3 general membrane protein functions/actions

A

attachment of other cells
cell to cell recognition
attachment to cytoskeleton

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13
Q

types of cell transport

A

passive

active

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14
Q

passive transport

A

cell doesn’t spend energy

happens cuz occurs “down” transportation gradient

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15
Q

active transport

A

cell spends energy (ATP)

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16
Q

eg. materials transported into cells (nutrients)

A 
O^2
water
iron
calcium
glucose
cortisol
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17
Q

eg. waste/products transported outta cells

A

carbon dioxide
minerals (ions)
lactic acid

18
Q

Particle Model of Matter

A

All matter = particles different sizes and shapes
Particles in constant random motion
Particles attract - form bonds of varying strengths
Matter = mainly empty space

19
Q

Brownion motion

A

random motion of particles

concluded by Robert Brown

20
Q

Might find other substance particles in spaces between articles (T/F)

A

T

21
Q

Factors affecting rate of diffusion

A

agitation
temp
molecule size

22
Q

solutes dissolve from low to high concentration (T/F) + why

A

F
high to low
due to random motion of particles

23
Q

Molecules travel away from concentrated area (T/F)

A

T

24
Q

selectively permeable membrane (spm)

A

barrier allowing only certain solutes through

25
Q

solutes allowed through spm based on

A

size
shape
electrical charge
lipid solubility

26
Q

electrical charge def in terms of plasma membrane

A

membrane is polar

27
Q

lipid solubility info

A

liver and kidneys may need to work first

28
Q

diffusion of water across membrane

passive process

A

osmosis

29
Q

water moves from high to low in osmosis (T/F)

A

T

30
Q

does a high solute concentration correspond to low water concentration

A

yes

less room for water due to solute taking up much space

31
Q

Hypertonic

A

higher solute concentration when compared to another solution

32
Q

Hypotonic

A

lower solute concentration when compared to another solution

33
Q

Isotonic

A

two solutions have same solute concentration

34
Q

tonicity

A

whether solution hypersonic/hypotonic/isotonic

35
Q

to reduce the dependence on diffusion, multicellular organisms have

A

developed other internal transport systems

36
Q

larger cells are more likely to survive than smaller cells. (T/F)

A

F

37
Q

more wastes must leave in larger cell (T/F)

A

T

38
Q

more molecules must move through the membrane in larger cell (T/F)

A

T

39
Q

distances from the cell membrane to various organelles greater in smaller cell (T/F)

A

F

40
Q

when cell in isotonic solution, individual water molecules …

A

can move back and forth across the cell membrane

41
Q

small substances soluble in lipids can pass through the cell membrane by

A

diffusion

42
Q

factor determining whether movement across cell membrane is active/passive transport

A

energy use

biology 10 (14 decks)

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