BIO SCI 93 Lecture Notes - Lecture 3: Turgor Pressure, Passive Transport, Glucose Transporter
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11 Oct 2016
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BIO SCI 93 Full Course Notes
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Nonpolar hydrophobic molecules can pass through (co2, o2) Supramolecular structure - many molecules ordered in a high level of organization. Concept 7. 2 membrane structure results in selective permeability. Concept 7. 3 passive transport is diffusion of a substance across a membrane with no energy investment. Diffusion - high to low concentration - no energy put into transportation. Ion channels - for atomic ions that are hydrophilic. Aquaporins - for water, blood cells increased rate of water diffusion. Diffuse down its concentration gradient (cid:1445)against(cid:1446) its concentration gradient = low to high requires energy. Osmosis - if the solute cannot diffuse, water may diffuse from the solution of low solute concentration to high solute concentration aka area of more free water molecules diffuses to area with less free water. Tonicity - the ability of s surrounding solution to make a cell gain or lose water. Hypertonic solution to a cell - water diffuses to out of cell.