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6595378
Membrane Structure and Transport
Descripción
1. Fluid Mosaic model 2. Movement of substance across membrane
Sin etiquetas
biology
stpm
Mapa Mental por
Ju Huan
, actualizado hace más de 1 año
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Creado por
Ju Huan
hace casi 8 años
10
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Resumen del Recurso
Membrane Structure and Transport
Singer-Nicolson Model
Fluid
Nota:
1.Lipid bilayer is a dynamic structure. 2. Protein can float in lipid 3.
Mosiac
Nota:
Protein molecules are dispersed and inserted individually into the lipid bilayer
Component
Proteins
Nota:
Act as electron carries
Lipids
Nota:
increase fluidity and permeability
Cholesterol
Nota:
regulates fluidity (less fluid in warm temperature , prevents solidifying in cool temperature)
Glycolipids
Glycoprotein
Nota:
Recognition features
Passive Transport
Simple Diffusion
Nota:
Absorption of Oxygen
Facilitated Diffusion
Nota:
Movement of potassium and sodium ion in neurones
Osmosis
Nota:
HIGH WATER POTENTIAL to LOW WATER POTENTIAL through a PARTIALLY PERMEABLE MEMBRANE
Active transport
Defination
Nota:
movement of particles across membrane against a concentration gradient through a biological pump
Bulk Transport
Endocytosis
Nota:
bulk transport of material through membranes INTO the cell by infolding or extension of membrane
Phogocytosis
Nota:
the ingestion of BACTERIA or other material by phagocytes
Pinocytosis
Nota:
the ingestion of LIQUID into a cell by the budding of small vesicles from the cell membrane.
Exocytosis
Nota:
bulk transport of material through membrane out of the cell by out folding or inverting the membrane.
Water potential = Solute potential + Pressure potential
Water Potential
Nota:
Free KINETIC ENERGY of water molecule
PURE WATER has highest water potential, 0.
Solute potential
Nota:
Negative component of water potential
also known as "osmotic pressure" or "osmotic potential"
Pressure potential
Nota:
Usually Positive
Hydrostatic pressure to which water is subjected.
Recursos multimedia adjuntos
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