Chapter 7 Cell Membrane

Question 1

Phospholipid Head is ___

Answer 1

Hydrophobic

Question 2

Phospholipid tail is

Answer 2

Hydrophilic

Question 3

cell membrane is the ___ of the cell

Answer 3

brain

Question 4

cell membrane is ___ perm

Answer 4

semi

Question 5

Fluid Mosaic Model: ___ and ___ ( year)

Answer 5

Singer and Nicholson’s 1973

Question 6

Singer and Nicholas were first to look at

Answer 6

proteins + choloestrol

Question 7

water environment = saline = ._% solution

Answer 7

.9% saline solution

Question 8

.9% saline solution provides___

Answer 8

balance

Question 9

why mosaic model ?

Answer 9

celll mem was complicated

Question 10

why fluid model ? ( 4)

Answer 10

Lateral movement, flip flopping, cholesterol, and unsaturated phospholipid tails

Question 11

Proteins (3)

Answer 11

Integral; Transmembrane; Peripheral

Question 12

Integral Protein

Answer 12

Inside

Question 13

Transmembrane protien function

Answer 13

transport

Question 14

Transport Protiens (2)

Answer 14

Channel and Carrier

Question 15

Channel Protiens are

Answer 15

hydrophobic; is a pathway so subs can move through

Question 16

channel proteins are aquaphorus

Answer 16

obtain water molecules

Question 17

Carrier Protiens…..

Answer 17

carried subs across membrane

Question 18

Channel protein shape and carrier

Answer 18

2 frowny faces VS 2 crescents

Question 19

Perm of Liq Bi-Layer

Answer 19

Non polar (no charge ) molecules = hydrophobic

Question 20

Nonpolar molecules mean

Answer 20

can all dissolve and cross membrane w/o protein help

Question 21

why can non polar molecules dissolves and cross membrane w/o protien help?

Answer 21

inside is non polar also ( like w like )

Question 22

Carrier Protiens

Answer 22

shape will match item to make accross: passive process

Question 23

3 Mechanisms

Answer 23

Diffusion, active transport, electrical charges

Question 24

Diffusion explained

Answer 24

A passive process by which a sub moves DOWN its own conc gradient from high to low until equilibrium

Question 25

Diffusion explained

Answer 25

A passive process by which a sub moves DOWN its own conc gradient from high to low until equilibrium

Question 26

Diffusion examples

Answer 26

Small perfume in a big room: salting roads

Question 27

Diffusion of water is called

Answer 27

Osmosis

Question 28

3 RBC cond

Answer 28

Hypotonic, Hypeetonic, Isotinic

Question 29

Animals cells conditions;

Answer 29

Hypotonic; lysed , isotonic , hypertonic: crenation

Question 30

Crenation

Answer 30

When the cell will shrivel and die

Question 31

Plants 3 conditions

Answer 31

Turgid, flaccid, Plasmolyzed

Question 32

2nd type of mechanism

Answer 32

Active Transport

Question 33

A.T is required in form of

Answer 33

ATP

Question 34

A.T means

Answer 34

moving sub up/against conc gradient

Question 35

A.T means

Answer 35

moving sub up/against conc gradient

Question 36

Sodium Potassoum Pump function

Answer 36

balances both K and NA in cells ; is a carrier protein

Question 37

explain carrier protein pump

Answer 37

3’NA+ ions go into it, take shape

Question 38

Carrier Protien pump process

Answer 38

1. Bind to carrier protien 2. stimulates phosphorus 3. ATP+ energy, 3Na released outside 4. Protiens changes shape to take on K+ 5. Loss of phos, back to same cycle

Question 39

A.T cell charges

Answer 39

Inside negative, cell membrane outside positive

Question 40

Animal Cell = ______ millivolts

Answer 40

-75

Question 41

6 steps of A.T

Answer 41

binds to carrier protien, stimulates phosphoration. ( add of phos), ATP + Energy 3NA released outside, protein changes shape for K

Question 42

-75MV =

Answer 42

resting membrane potential

Question 43

Plants A.T is

Answer 43

Proton Pump

Question 44

How does H+ come back in plants

Answer 44

H+ Sucrose cotransportor

Question 45

proton pump does what

Answer 45

removes H+ ions from cell

Question 46

Does H+ sucrose contransportor require energy?

Answer 46

No its like a waterfall, h+ carries surcrose

Question 47

2 Kinds of Bulk Transport

Answer 47

Exocytosis and Endocytosis

Question 48

Exocytosis

Answer 48

Out the cell

Question 49

Endocytosis (4)

Answer 49

Phagocytosis, Pinocytosis, Receptor mediated endocytosis, receptor protiens

Question 50

No receptors means

Answer 50

Cholestrol can't be removed