CELL MEMBRANE STRUCTURES THINGS TO REMEMBER

Question 1

Saturated Tails

Answer 1

1-Straighter
2- they are packed more closely

Question 2

Increase in Temperature

Answer 2

Atoms are moving fast on average

Question 3

Decrease in Temperature

Answer 3

Atom are moving slow on Average

Question 4

Fludility and Temprature

Answer 4

Fluidility can change depending on the Temprature

Question 5

Less Fluid

Answer 5

1-Longer and More saturated Chains
2- More cholesterol

Question 6

More Fluid

Answer 6

1- Less Cholesteral
2- More Saturated Chains

Question 7

What are cell membranes made of

Answer 7

Phospholipids

Question 8

Phospholipids

Answer 8

1-Smooth ER
2- Are Amphipathic

Question 9

What does cholesteral do

Answer 9

Stabilize the hydrophobic interactions between tails

Question 10

What do protiens do

Answer 10

Transport

Question 11

What does less cholesteral mean

Answer 11

1-More fluidity
2-easily permeable

Question 12

Unsaturated Tails

Answer 12

1-Have kinks that cause them to be packed loosely
2-Increase the fluidity and permeability

Question 13

Saturated Tails

Answer 13

1-Packed closely
2- less permeable

Question 14

what do Shorter tails do

Answer 14

Make membrane narrow and increse permeability

Question 15

Selective permeable

Answer 15

1-Only certain substances can pass through
2- Biological membranes

Question 16

What are membranes impermeable to

Answer 16

Ions and large polar molecules

Question 17

What are the 2 ways materals transport across the membrane

Answer 17

1- Diffusion: With need of energy
2- Active Transport: With the use of energy

Question 18

what are channels for

Answer 18

Transport of ions and small molecules like water

Question 19

What are carriers for

Answer 19

Transport of large polar molecules like sugars

Question 20

OSMOSIS
Hypotonic Solution

Answer 20

More water and less solute

Question 21

OSMOSIS
Isotonic solution

Answer 21

Equal water and solute

Question 22

OSMOSIS
Hypertonic Solution

Answer 22

Less water and more solute compares to cell

Question 23

Osmotic Movement of water out of cell

Answer 23

shrinkage of cell

Question 24

Equal Osmotic of water in and out of cell

Answer 24

Maintain Shape cell

Question 25

Osmotic movement of water into cell

Answer 25

Causes swelling of the cell

Question 26

PASS THROUGH PHOSPOLIPID BILAYER
Small non polar molecules

Answer 26

Can pass easily

Question 27

PASS THROUGH PHOSPOLIPID BILAYER
Small Uncharged polar

Answer 27

1-Can pass with some difficulty across membrane
2-they benefit from the help of transport proteins

Question 28

PASS THROUGH PHOSPOLIPID BILAYER
Larger Uncharged polar

Answer 28

1-Have difficulty passing through the membrane bilayer
2- NEED the help of transport protiens

Question 29

PASS THROUGH PHOSPOLIPID BILAYER
Charged Ions

Answer 29

1- Cant directly pass across the membrane Bilayer
2- NEED transporter Protiens