CELL MEMBRANE STRUCTURES THINGS TO REMEMBER Flashcards

1
Q

Saturated Tails

A

1-Straighter
2- they are packed more closely

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2
Q

Increase in Temperature

A

Atoms are moving fast on average

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3
Q

Decrease in Temperature

A

Atom are moving slow on Average

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4
Q

Fludility and Temprature

A

Fluidility can change depending on the Temprature

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5
Q

Less Fluid

A

1-Longer and More saturated Chains
2- More cholesterol

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6
Q

More Fluid

A

1- Less Cholesteral
2- More Saturated Chains

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7
Q

What are cell membranes made of

A

Phospholipids

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8
Q

Phospholipids

A

1-Smooth ER
2- Are Amphipathic

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9
Q

What does cholesteral do

A

Stabilize the hydrophobic interactions between tails

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10
Q

What do protiens do

A

Transport

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11
Q

What does less cholesteral mean

A

1-More fluidity
2-easily permeable

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12
Q

Unsaturated Tails

A

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

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13
Q

Saturated Tails

A

1-Packed closely
2- less permeable

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14
Q

what do Shorter tails do

A

Make membrane narrow and increse permeability

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15
Q

Selective permeable

A

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

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16
Q

What are membranes impermeable to

A

Ions and large polar molecules

17
Q

What are the 2 ways materals transport across the membrane

A

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

18
Q

what are channels for

A

Transport of ions and small molecules like water

19
Q

What are carriers for

A

Transport of large polar molecules like sugars

20
Q

OSMOSIS
Hypotonic Solution

A

More water and less solute

21
Q

OSMOSIS
Isotonic solution

A

Equal water and solute

22
Q

OSMOSIS
Hypertonic Solution

A

Less water and more solute compares to cell

23
Q

Osmotic Movement of water out of cell

A

shrinkage of cell

24
Q

Equal Osmotic of water in and out of cell

A

Maintain Shape cell

25
Osmotic movement of water into cell
Causes swelling of the cell
26
PASS THROUGH PHOSPOLIPID BILAYER Small non polar molecules
Can pass easily
27
PASS THROUGH PHOSPOLIPID BILAYER Small Uncharged polar
1-Can pass with some difficulty across membrane 2-they benefit from the help of transport proteins
28
PASS THROUGH PHOSPOLIPID BILAYER Larger Uncharged polar
1-Have difficulty passing through the membrane bilayer 2- NEED the help of transport protiens
29
PASS THROUGH PHOSPOLIPID BILAYER Charged Ions
1- Cant directly pass across the membrane Bilayer 2- NEED transporter Protiens