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A&P > Chapter 3 Section 3 (Lecture) > Flashcards

Chapter 3 Section 3 (Lecture) Flashcards

1
Q

Plasma Membrane

A

Phospholipid bilayer, selectively permeable, separates cytosol and ECF.

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2
Q

What is selective permeability based on?

A

Characteristics of the substance and Features of the membrane.

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3
Q

What are the types of membrane transport?

A

Passive and Active.

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4
Q

Does passive transport require ATP?

A

NO

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5
Q

Does active transport require ATP?

A

Yes.

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6
Q

Name examples of passive transport.

A

Diffusion and osmosis.

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7
Q

Name examples of active transport.

A

Vesicular Transport.

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8
Q

Diffusion is what?

A

The movement of a substance across its concentration gradient from a higher to lower concentration.

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9
Q

Where does diffusion occur?

A

In the air and in solutions.

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10
Q

In ECF water and solutes diffuse how?

A

Freely.

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11
Q

Diffusion rates are affected by?

A

several factors.

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12
Q

Diffusion is directly related to?

A

Temperature and size of concentration gradient.

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13
Q

Diffusion is inversely related to?

A

Distance of diffusion and molecular size of diffusing substance.

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14
Q

Electrical attraction

A

accelerates diffusion.

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15
Q

Electrical repulsion

A

reduces rate of diffusion.

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16
Q

Osmosis

A

The diffusion of water across a selectively permeable membrane; from lower concentration to higher.

17
Q

A solution can be expressed how?

A

in terms of its osmolarity and its tonicity

18
Q

osmolarity

A

the total solute concentration of the solution

19
Q

Tonicity

A

effect of the solution on cell volume

20
Q

3 types of tonicity

A

isotonic, hypertonic, hypotonic

21
Q

Isotonic solution

A

cell stays the same

22
Q

Hypotonic solution

A

cell swells because of osmotic flow into the cell

23
Q

Hypertonic solution

A

cell shrivels because of osmotic flow out of the cell

24
Q

Carrier-mediated transport

A

hydrophilic molecules are transported across the cell membrane by carrier proteins

25
Q

3 types of carrier-mediated transport

A

facilitated diffusion, active transport, secondary active transport

26
Q

Facilitated diffusion is

A

passive

27
Q

Active transport requires

A

ATP

28
Q

Secondary active transport requires

A

ATP indirectly

29
Q

Vesicular transport

A

substances are moved across plasma membrane in vesicles

30
Q

vesicular transport always requires what?

A

ATP

31
Q

Two types of vesicular transport.

A

Endocytosis and exocytosis

32
Q

Endocytosis

A

movement into cell

33
Q

exocytosis

A

movement out of cell

34
Q

3 types of endocytosis

A
  1. receptor-mediated endocytosis
  2. pinocytosis
  3. phagocytosis
35
Q

receptor mediated endocytosis

A

ligand binds receptor in membrane

36
Q

pinocytosis

A

vesicles form at membrane

37
Q

phagocytosis

A

white blood cell membranes surrounds the bacteria

A&P (2 decks)

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