PSYC 273 Lecture Notes - Lecture 3: Cell Nucleus, Peripheral Nervous System, Schwann Cell
Document Summary
In the nervous system, there are two primary types of cells: nerve cells (neurons): highly organized cells that convey information between each other across tiny gaps, i. e. synapses, glial cells: supportive cell in the central nervous system. Communicate with each other and neurons and provide raw materials and chemical signals. Dendrites: tree like extensions that make up the input-zone and receive info from other neurons (input zone) Combines and transforms inputs that are received from the dendrites (integration zone) Axon: transmits the cell"s info in the form of electrical pulses (conduction zone) Axon terminals: the output, sends info across the synapse (output zone) Multipolar: one axon and many dendrites, most common. Bipolar: single axon at one end and one dendrite and the other end. Unipolar: single axon extends in two directions from cell body. One end contains dendrites, whereas other end contains axon terminals. Long axons that contract muscles in response to commands from the brain.
