Human Biology - Cell Surface Membrane and Transport Across Cell Membranes

Descrição

A-Level Human Biology Unit 1 FlashCards sobre Human Biology - Cell Surface Membrane and Transport Across Cell Membranes, criado por mcrfan354 em 11-04-2015.
mcrfan354
FlashCards por mcrfan354, atualizado more than 1 year ago
mcrfan354
Criado por mcrfan354 aproximadamente 9 anos atrás
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Resumo de Recurso

Questão Responda
BIMOLECULAR (BILAYER) Phospholipid molecules stretched out to form 2 layers
FLUID MOSAIC MODEL Components free to move fluidly, and proteins in the bilayer vary in shape, size and pattern and are arranged like a mosaic.
PASSIVE TRANSPORT Does not involve the use of metabolic transport
DIFFUSION Movement of molecules from a region of high concentration to a region of low concentration, until they are equally distributed (along a concentration gradient)
ACTIVE TRANSPORT Energy-requiring process in which molecules are moved across membranes against a concentration gradient
SOLUTE Any substance that is dissolved in a solvent. SOlutes and solvents form a solution
OSMOSIS The passage of water from a region of high water potential to a region of low water potential through a partially permeable membrane
WATER POTENTIAL The tendency of water molecules to leave a system Ψ = Ψs + Ψp Water potential = solute potential + pressure potential
TURGID The cell vacuole is full of water and the cytoplasm is pushed against the cell wall
HAEMOLYSIS If red blood cells are placed in distilled (pure) water, water enters by osmosis and they burst

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