LIFESCI 23L Study Guide - Final Guide: Saltatory Conduction, Resting Potential, Electrochemical Gradient
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Monday, december 11, 2017 8:59 pm: nervous system is composed of two types of cells: neurons and glia. Cns myelin), guillain-barre: pns is demyelinated by immune system: astrocytes are glia that make up blood brain barrier, keep out microorganisms using microglia as macrophages, permeable to lipids like alcohol. Sensory cells send action potentials to cns which sends signals to effectors through pns: peripheral nervous system: neurons extending from brain and spinal cord throughout body, how neurons exchange information: synapses. Chemical synapse: presynaptic neuron releases neurotransmitter causing chemical change in postsynaptic neuron causing action potential propagation: can either inhibit or excite postsynaptic neuron. Electrical synapse: action potential jumps directly across synapse: can only be excitatory, used in rapid response. Excitatory synapses respond with depolarization: motor cells and muscle neurons are excitatory. Inhibitory synapses hyperpolarize pushing neuron farther away from threshold potential: cl gated channels https://onenote. officeapps. live. com/o/onenoteframe. aspx?ui=en%2 aming=1&mscc=1&wdodb=1&hid=591b5f9e-9007-5000-7185-050b2be737cb.
