Biology HL Definitions from syllabus, 1.3, 2.5, 6.3, 6.5

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  • Created by: Foxic
  • Created on: 03-05-15 17:13
Define diffusion
The passive movement of particles from a region of high concentration to a region of low concentration
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Define osmosis
The passive movement of water molecules, across a partially permeable membrane, from a region of lower solute concentration to a region of higher solute concentration
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Define enzyme
A globular protein functioning as a biological catalyst in chemical reactions
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Define active site
The site on the surface of an enzyme to which substrate or substrates bind and which catalyses a chemical reaction involving the substrate
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Define denaturation
The structural change in a protein that results in the loss (usually permanent) of biological properties
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Define pathogen
An organism or virus that causes a disease
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Define resting potential
The electrical potential across the plasma membrane of a cell that is not conducting an impulse
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Define action potential
The depolarization and repolarization of the electrical potential across the plasma membrane of a cell, as an electrical impulse passes along it
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Define depolarization
The reversal of the electrical potential across the plasma membrane
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Define repolarization
The restoration of the electrical potential across the plasma membrane
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Other cards in this set

Card 2

Front

Define osmosis

Back

The passive movement of water molecules, across a partially permeable membrane, from a region of lower solute concentration to a region of higher solute concentration

Card 3

Front

Define enzyme

Back

Preview of the front of card 3

Card 4

Front

Define active site

Back

Preview of the front of card 4

Card 5

Front

Define denaturation

Back

Preview of the front of card 5
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