BIOLOGY 152 Lecture Notes - Lecture 6: Faraday Cage, Membrane Potential, Cell Membrane
3 Feb 2016
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Bio152 lecture 6 synapse and membrane potential. Place where synaptic terminals of a neuron come into contact with another neuron. Electrical within a neuron: all cell membranes have an electrical potential. An un-stimulated cell usually has a resting potential of -70mv. The probes could be used to clamp a protein. Membrane potential the electrical potential a cell"s membrane. Differences between ion concentrations inside and outside of the cell. Inside of the cell: mostly potassium (k+, some sodium (na+, lots of impermeable macromolecules with a negative charge (-), sulfates (-), & phosphates (-) Outside of the cell: mostly na, less k, lots chloride (cl-), but not important to nerve signals. We measure the ion concentration by the relative inside to the outside. Un-gated ion channels are passive and exhibit diffusion. Both ion pumps and gated ion channels are active and change shape. The proteins are embedded in the cell membrane.
