PSYC 1101 Lecture Notes - Lecture 1: Homeostasis, Dendrite, Peripheral Nervous System
29 Sep 2017
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Document Summary
Gathers information from body and external world, sends information to body and muscles. Connects muscles, organs, and sensory receptors to the central nervous system. Muscle and sensory receptors to external world. Building blocks of our body"s neural information system are called neurons or nerve cells. Each neuron consist of a cell body and branching fibers. Dendrite fibers: receive information and conduct it toward the cell body. Axon fiber passes the message through its terminal branches to other neurons or muscles. Myelin sheath: a layer of fatty tissue that insulates axons and speeds their impulses. Glial cells: support neurons and protect cerebral cortex. Neuron is like queen bee and glial cells are worker bees. Provide nutrients, insulate myelin, guide neural connections, and mop up ions and neurotransmitters. The more complex the brain, the bigger the proportion of glial cells present chemical signals from neighboring neurons down axon) Neurons transmit messages when stimulated by signals from our senses or triggered by.
