KP222 Lecture Notes - Lecture 6: Central Nervous System, Peripheral Nervous System, Homeostasis
22 Jan 2019
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Document Summary
Anatomical divisions of the nervous system: 1. Consists of the spinal cord and brain: 2. Includes all neural tissue outside the cns. Neurons are cells that send and receive electrical signals rapidly and over long distance if needed. Brain and spinal cord: integrating centres for homeostasis, movement and other functions, control the nervous system (all neural tissue in body, netwrok of trillions of nerve cells (highly organized, picture. Shape, #, and length can vary of axons and dendrites. Contains nucleus and most organelles: 2. Axon hillock: where axon originates and actions potential are intitiated. Cell body (soma: resembles a typical cell, contains: Other organelles to direct cellular activity: position varies in di erent types of neuroses, essential to the well being of the neutron, picture. Dendrites: thin, branched processes, receive incoming information, increase the surface area of the neutron, allow communication with multiple other neutrons. Dendritic spines: very ne processes, further increase surface area.
