BIOL 2160 Lecture : Phys Notes 10 23
Document Summary
A dendrite is for receiving information, and sends info to the nucleus (the control center). An axon sends info away from the cell body. (axon away) The neuron sending info is presynaptic and the one receiving is the post synaptic. Synapse the area between the axon terminal and the dendrite, the gap between. Cns: cell bodies often grouped in nuclei and axons are grouped in bundles or commissures. Pns: cell bodies often grouped in ganglia and axons are grouped together in nerves. Cns axons don"t really regenerate, while pns do most of the time. Means that they can change their membrane potentials in a regulated fashion. High electrical resistance (low electrical conductance in the membrane. Intracellular solution has a low electrical resistance (high conductance). The membrane is a separation of electrical charge, and leads to electrical potential (voltage). Determined by: concentration gradients of different ions across membrane (equilibrium potential .
