Modes of transport Flashcards

1
Q

endocytosis

A

bulk movement of large molecules into the cell

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2
Q

exocytosis

A

bulk movement of large molecules out of the cell

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3
Q

passive

A

no energy requiredfi

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4
Q

diffusion

A

net movement of particles from a high concentration to a low concentration, down a concentration gradient

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5
Q

osmosis

A

net movement of water molecules from a high concentration, through a partially permeable membrane, to a low concentration

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6
Q

facilitated diffusion

A

net movement of particles from a high concentration to a low concentration, down a concentration gradient, through a protein channel/ carrier

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7
Q

active

A

requires energy

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8
Q

active transport

A

net movement of particles from a low concentration, toa high concentration . against the concentration gradient using ATP and a protien pump

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9
Q

SIMPLE DIFFUSION examples

A

FAT SOLUBLE, SMALL, VITAMINS, NON-CHARGED

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10
Q

CHANNEL MEDIATED FACILITATED DIFFUSION examples

A

IONS, WATER

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11
Q

CARRIER MEDIATED FACILITATED DIFFUSION examples

A

POLAR MOLECULES, LARGE, SUGAR, AMINO ACIDS
- LEAK CHANNELS = always open

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12
Q

CHEMICAL/LIGAND GATED CHANNELS

A

Responds when a chemical such as a NT binds to it

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13
Q

VOLTAGE GATED CHANNELS

A

Opens in response to a change in membrane potential.

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14
Q

MECHANICAL GATED CHANNELS

A

Opens in response to physical deformation, e.g.,touch.

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15
Q

OSMOLARITY

A

The total number of solute particles present in 1L of solution. (e.g., the osmolarity of a solution of NaCl at 300 mmol/L is 600 mmol/L

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16
Q

HYPERTONIC

A

The solution has a higher number of molecules than in the cell.
Water moves out of the cell causing it to shrink

17
Q

HYPOTONIC

A

The solution has a lower number of molecules than in the cell.
Water moves into the cell causing it to swell

18
Q

ISOTONIC

A

The solution and the cell have an equal number of molecules.

19
Q

TONICITY

A

the ability to change the shape or tone of cells by altering the cells internal water volume

20
Q

leak channels

A
  • always open
  • allow ions or water to move according to concentration gradient
21
Q
A