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Bio 1 > Chaoter 7: Membrane > Flashcards

Chaoter 7: Membrane Flashcards

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Biology 101 flashcards
1
Q

What part of a phospholipd is polar? Which one is nonpolar?

A

The head is polar, the tails are nonpolar

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2
Q

What does cholesterol do in the cell membrane?

A

Stabilize cells in hot weather

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3
Q

What are the teo major classes of proteins?

A

Integral and peripheral

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4
Q

Which protiens are transmembrane and amphipathic?

A

Integral

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5
Q

What is a peripheral protein?

A

1 of 2 major classes of membrane proteins,
They sit on the surface

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6
Q

What do amphipathic mean?

A

Protein has ares that are charged (love water)and uncharged (hate water)

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7
Q

Integral membranes are…

A

Amphipathic

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8
Q

Why are glycoproteins important?

A

They important for immune response, cell to cell recognition

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9
Q

What areas in the body are guarded because of immune response?

A

The eye and the uterus

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10
Q

All cell membranes are the same. T or F

A

False, they are all different depending on their function

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11
Q

What happens on the cell membrane in HIV?

A

The HIV virus is based on RNA
HIV binds to CD4 (glycoprotein on white T blood cells)

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12
Q

What causes cystic fibrosis?

A

A Cl anionic channel defect

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13
Q

Hypotonic

A

Less particles, more water
HYPO, MORE H20
More h20 on the outside

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14
Q

Hypertonic

A

More particles, LESS H20

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15
Q

What happens to cells in a hypotonic solution

A

They gain water and lyse

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16
Q

What happens to cells im a hypertonic solution?

A

They lose water, shriveled(crenate)

17
Q

What is facilitated diffusion?

A
18
Q

What is active transport

A

Transport that requires energy because it moves against the concentration gradient

19
Q

Facilitated diffusion requires energy

A

False

20
Q

Facilitated transport uses

A

Diffusion

21
Q

What does tertrodotoxin do?

A

It paralyzes sodium potassium pumps

22
Q

ONE substance in ONE direction

A

Uniport

23
Q

Symport

A

TWO substances in the SAME direction

24
Q

Antiport

A

TWO substances in OPPOSITE directions, examples sodium potassium pump

25
Q

Aquaporins

A

Rapid water transport channels

26
Q

What is an electrogenic pump?

A

They create an electrical gradient across the membrane

27
Q

What two processes makeup bulk transport?

A

Endo and exocytosis

28
Q

Exocytosis

A

Take large molecules out the cell

29
Q

Endocytosis

A

Take big molecules into the cell

30
Q

What are the three types of endocytosis?

A

Phago and pinocytosis
Receptor mediated endicytosis

31
Q

Phagocytosis

A

Cells eat and kill the germ

32
Q

What endocytosis do we not use?

A

Pinocytosis, reaching out to drink the water

33
Q

What is receptor mediated endocytosis?

A
34
Q

Cholesterol transport by RME

A

Bio 1 (9 decks)

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