Physiology 2130 Lecture Notes - Resting Potential, Axon Hillock, Electrochemical Gradient
25 Feb 2013
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Document Summary
Virtually all cells in the body have membrane potentials. Electrochemical gradients of the major intercellular and extracellular ions establish and maintain membrane potential. Thin branching processes of cell body that receive incoming signals. Overall sa of neuron so it can communicate with other neurons. # dendrites vary depending on where nerve cell is located in the. Contains nucleus and all other organelles needed to direct cellular nervous system activity. Projection of the cell body that carries the outgoing signal to the. Myelin sheath target cell in the form of an action potential. Layered phospholipid membrane sheath wrapped tightly around the axon. Insulated with a fatty acid material called myelin, produced by special cells: schwann cells. Schwann cells: in pns and oligodendrocytes in cns. Effect of this myelin is to insulate the axon so few ions can leak out through the membrane.
