BIOL-K - Biology BIOL-K 103 Lecture 7: Biology K103 Ch 41
27 Apr 2016
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Transmission to cns: afferent neurons carry incoming signal. Integration: combining incoming info and establishing response. Transmission from cns: efferent neurons to effectors. Action by effectors: (e. g. muscles or glands) Multipolar: cell body surrounded by dendrites and one major structure, the axon, goes out from that body, in direction nerve impulse will travel. Bipolar: special senses (taste, vision, the dendrites (receivers) on the stem and are connected to cell body and to axon. Pseudo-unipolar: off to the side of direct pathway and dendrites are connected to axon and the cell body is sitting on axon. Afferent (sensory) carry info from periphery into the nervous system. Integration is connection between incoming and outgoing info. Efferent (motor) from nervous system to effector (exit) Axon surface may be: myelinated axons generally larger and have a sheath of myelin around them. Tend to conduct faster: unmyelinated: generally smaller diameter do not have complete myelin sheath around them and conduct slower.
