11842921
Descrição
Mapa Mental por Irene Binil, atualizado more than 1 year ago
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Criado por Irene Binil
quase 7 anos atrás
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Transport across membranes
- Cell Membrane
- Made of phospholipid
bi-layer and other
proteins
- The bi-layer allos lipid soluble molecules to pass through
by simple diffusion but prevents the passage of small
polar ions
- The bi-layer allos lipid soluble molecules to pass through
by simple diffusion but prevents the passage of small
polar ions
- selectively permeable membrane
- Made of phospholipid
bi-layer and other
proteins
- Fluid-mosaic model
- The lipid bi-layer gives fluidity and elasticity to the cell
membrane.
- The lipid bi-layer gives fluidity and elasticity to the cell
membrane.
- Cholesterol in the cell membrane
- Decreases permeability and increases
stability of the membrane
- Different type of cells have different amounts of
cholesterol
- Decreases permeability and increases
stability of the membrane
- Carrier proteins
- Aid the transport of ions/polar molecules
and large molecules (facilitated diffusion
and active transport)
- Aid the transport of ions/polar molecules
and large molecules (facilitated diffusion
and active transport)
- Enzymes can also be
found embedded on
the membrane
- Glycoprotiens
- Composed of carbohydrate and protiens, are on
the outer surface of the membrane are
important in cell recoginition and sometimes act
as antigens
- Composed of carbohydrate and protiens, are on
the outer surface of the membrane are
important in cell recoginition and sometimes act
as antigens
- Aquaporins
- Aids the movement of water across the
membrane
- Aids the movement of water across the
membrane
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