PSY100Y5 Chapter Notes - Chapter 3: Cerebrospinal Fluid, Encase, Nervous Tissue
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PSY100Y5 Full Course Notes
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The cells in the nervous system fall into two categories: glia & neurons: neurons individual cells in the nervous system that receive, integrate, and transmit information. Soma cell body, which contains the cell nucleus and much of the chemical machinery common to most cells. Dendrite (dendritic trees) parts of a neuron that are specialized to receive information. From the dendrite, information flows into the cell body and then travels away from the soma along the axon. Axon a long, thin fibre that transmits signals away from the soma to other neurons, muscles or glands: in humans, many axons are wrapped in cells with a concentration with a white fatty substance called myelin. Terminal buttons the axon ends with these. They are small knobs that secrete chemicals called neurotransmitters: these chemicals serve as messengers that may activate neighboring neuron. Synapses point at which neurons interconnect. Synapse a junction where information is transmitted from one neuron to another.
