Biology 113
Fall 2001
Lecture outline 15
10/01/01
Membrane transport
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simple diffusion
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facilitated diffusion
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primary active transport - pumps
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secondary active transport
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carriers - cotransporters, exchangers.
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The pump-leak hypothesis for resting membrane potential and ion concentrations.
The equilibrium potential.
Transport during action potential.
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Propagation of the action potential
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Saltatory propagation in myelinated nerves
Cell volume regulation
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Why regulate cell volume?
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Cells in hypotonic and hypertonic solutions.
The synapse
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An example, the neuromuscular junction
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Vesicle formation
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ACh release
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ACh receptors
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Acetylcholinesterase
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