CAS BI 108 Lecture Notes - Active Transport, Facilitated Diffusion, Glucose Transporter

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16 Feb 2014
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Lecture highlights: chapter 6: water diffuses passively through membranes via, lipid bilayer (simple diffusion, aquaporins (facilitated diffusion, channel proteins are gated and change shape in order to open. The stimulus for this can be a molecule (ligand-gated) or electrical charge (voltage-gated). It"s also important to note that the channel protein has a binding site for the regulator, not for what passes through: carrier proteins also contain a ligand-binding site. An example of this is the glucose transporter: primary active transport requires atp binding directly, secondary active transport utilizes the gradient generated by primary. How do cells interact with other cells: binding: specific protein receptors in the plasma membrane, diffusion through the membrane into the cell. *both involve a specific chemical (ligand) targeting and binding a specific protein (receptor) to initiate a specific biological response. Ion channel receptors a: protein kinase receptors, g protein linked receptors.

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