3.1 The Cell Membrane Flashcards

1
Q

Cell Membrane

A

an extremely pliable structure composed primarily of back-to-back phospholipids (a “bilayer”)

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2
Q

an extremely pliable structure composed primarily of back-to-back phospholipids (a “bilayer”)

A

Cell Membrane

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3
Q

Hydrophilic Molecule

A

is attracted to water

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4
Q

is attracted to water

A

Hydrophilic Molecule

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5
Q

Hydrophobic Molecule

A

repelled by water

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6
Q

repelled by water

A

Hydrophobic Molecule

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7
Q

Amphipathic Molecule

A

contains both a hydrophilic and a hydrophobic region

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8
Q

contains both a hydrophilic and a hydrophobic region

A

Amphipathic Molecule

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9
Q

Phospholipid Structure Reference

A
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10
Q

Intracellular Fluid (ICF)

A

the fluid interior of the cell

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11
Q

the fluid interior of the cell

A

Intracellular Fluid (ICF)

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12
Q

Extracellular Fluid (ECF)

A

the fluid environment outside the enclosure of the cell membrane

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13
Q

the fluid environment outside the enclosure of the cell membrane

A

Extracellular Fluid (ECF)

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14
Q

Interstitial Fluid(IF)

A

the term given to extracellular fluid not contained within blood vessels

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15
Q

the term given to extracellular fluid not contained within blood vessels

A

Interstitial Fluid(IF)

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16
Q

Phospholipid Bilayer Reference

A
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17
Q

Integral Protein

A

a protein that is embedded in the membrane

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18
Q

a protein that is embedded in the membrane

A

Integral Protein

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19
Q

Channel Protein

A

is an example of an integral protein that selectively allows particular materials, such as certain ions, to pass into or out of the cell

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20
Q

is an example of an integral protein that selectively allows particular materials, such as certain ions, to pass into or out of the cell

A

Channel Protein

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21
Q

Cell Membrane Reference

A
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22
Q

Receptor

A

protein molecule that contains a binding site for another specific molecule (called a ligand)

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23
Q

protein molecule that contains a binding site for another specific molecule (called a ligand)

A

Receptor

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24
Q

Ligand

A

molecule that binds with specificity to a specific receptor molecule

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25
Q

molecule that binds with specificity to a specific receptor molecule

A

Ligand

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26
Q

Glycoprotein

A

protein that has one or more carbohydrates attached

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27
Q

protein that has one or more carbohydrates attached

A

Glycoprotein

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28
Q

Glycocalyx

A

coating of sugar molecules that surrounds the cell membrane

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29
Q

coating of sugar molecules that surrounds the cell membrane

A

Glycocalyx

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30
Q

Peripheral Proteins

A

membrane-associated protein that does not span the width of the lipid bilayer, but is attached peripherally to integral proteins, membrane lipids, or other components of the membrane

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31
Q

membrane-associated protein that does not span the width of the lipid bilayer, but is attached peripherally to integral proteins, membrane lipids, or other components of the membrane

A

Peripheral Proteins

32
Q

Selective Permeability

A

feature of any barrier that allows certain substances to cross but excludes others

33
Q

feature of any barrier that allows certain substances to cross but excludes others

A

Selective Permeability

34
Q

Passive Transport

A

the movement of substances across the membrane without the expenditure of cellular energy

35
Q

is the movement of substances across the membrane without the expenditure of cellular energy

A

Passive Transport

36
Q

Active Transport

A

the movement of substances across the membrane using energy from adenosine triphosphate (ATP)

37
Q

the movement of substances across the membrane using energy from adenosine triphosphate (ATP)

A

Active Transport

38
Q

Concentration Gradient

A

difference in the concentration of a substance between two regions

39
Q

difference in the concentration of a substance between two regions

A

Concentration Gradient

40
Q

Diffusion

A

movement of a substance from an area of higher concentration to one of lower concentration

41
Q

movement of a substance from an area of higher concentration to one of lower concentration

A

Diffusion

42
Q

Simple Diffusion

A

molecules moving across a cell membrane from the side where they are more concentrated to the side where they are less concentrated

43
Q

molecules moving across a cell membrane from the side where they are more concentrated to the side where they are less concentrated

A

Simple Diffusion

44
Q

Simple Diffusion Reference

A
45
Q

Facilitated Diffusion

A

the diffusion process used for those substances that cannot cross the lipid bilayer due to their size, charge, and/or polarity

46
Q

the diffusion process used for those substances that cannot cross the lipid bilayer due to their size, charge, and/or polarity

A

Facilitated Diffusion

47
Q

Facilitated Diffusion Reference

A
48
Q

Osmosis

A

the diffusion of water through a semipermeable membrane

49
Q

the diffusion of water through a semipermeable membrane

A

Osmosis

50
Q

Osmosis Reference

A
51
Q

Isotonic (equal tension)

A

two solutions that have the same concentration of solutes

52
Q

two solutions that have the same concentration of solutes

A

Isotonic (equal tension)

53
Q

Hypertonic

A

a solution that has a higher concentration of solutes than another solution

54
Q

a solution that has a higher concentration of solutes than another solution

A

Hypertonic

55
Q

Hypotonic

A

a solution that has a lower concentration of solutes than another solution

56
Q

a solution that has a lower concentration of solutes than another solution

A

Hypotonic

57
Q

Concentration of Solutions Reference

A
58
Q

Sodium-Potassium Pump (Na+/K+ ATPase)

A

transports sodium out of a cell while moving potassium into the cell

59
Q

transports sodium out of a cell while moving potassium into the cell

A

Sodium-Potassium Pump (Na+/K+ ATPase)

60
Q

Electrical Gradient

A

a difference in electrical charge across a space

61
Q

a difference in electrical charge across a space

A

Electrical Gradient

62
Q

Sodium-Potassium Pump Reference

A
63
Q

Endocytosis (bringing into the cell)

A

import of material into the cell by formation of a membrane-bound vesicle

64
Q

import of material into the cell by formation of a membrane-bound vesicle

A

Endocytosis (bringing into the cell)

65
Q

Vesicle

A

membrane-bound structure that contains materials within or outside of the cell

66
Q

membrane-bound structure that contains materials within or outside of the cell

A

Vesicle

67
Q

Phagocytosis (“cell eating”)

A

the endocytosis of large particles

68
Q

the endocytosis of large particles

A

Phagocytosis (“cell eating”)

69
Q

Pinocytosis (“cell drinking”)

A

brings fluid containing dissolved substances into a cell through membrane vesicles (endocytosis of fluid)

70
Q

brings fluid containing dissolved substances into a cell through membrane vesicles (endocytosis of fluid)

A

Pinocytosis (“cell drinking”)

71
Q

Three Forms of Endocytosis Reference

A
72
Q

Receptor-Mediated Endocytosis

A

is endocytosis by a portion of the cell membrane that contains many receptors that are specific for a certain substance

73
Q

is endocytosis by a portion of the cell membrane that contains many receptors that are specific for a certain substance

A

Receptor-Mediated Endocytosis

74
Q

Exocytosis (taking out of the cell)

A

is the process of a cell exporting material using vesicular transport

75
Q

is the process of a cell exporting material using vesicular transport

A

Exocytosis (taking out of the cell)

76
Q

Exocytosis Reference

A