PSY 3 Lecture Notes - Lecture 2: Chemotherapy, Thiamine, Active Transport
17 Jan 2017
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Document Summary
Can you understand behavior by looking at individual neurons: no, must look at entire neuron network. Neurons and glia make up entire nervous system. Most of the 86 billion cells are in the cerebellum. Santiago ramon y cajal was first to show individual cells comprising nervous system remain separate by mixed staining techniques (synaptic gap) Neurons: membrane, nucleus, mitochondria, er ribosomes. Motor: soma in the spinal cord, receives excitation from other neurons, conducts impulses from axon to muscle. Sensory: sensitive at one end to sensation (touch, light, sound, etc. , shapes vary depending on the sense it conveys. Surface lined with synaptic receptors responsible for bringing info into the neuron. Some contain dendritic spines to increase surface area. Greater surface area = more info received: soma/cell body. Responsible for the metabolic work of the neuron. Covered with synapses on its surface in many neurons: axon. Thin fiber responsible for transmitting nerve impulses toward other neurons, organs or muscles.
