PSY 2012 Chapter Notes - Chapter 2: Motor Neuron, Insomnia, Occipital Lobe
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Most neurons include a cell body, dendrites, and an axon c. i. 1. The cell body contains the core or nucleus of a cell. c. i. 1. a. The nucleus uses oxygen and nutrients to generate c. i. 2. the energy needed to carry out the work of the cell. Dendrites are root-like structures, attached to the cell body of a neuron, that receive impulses, or incoming messages, from other neurons. c. i. 3. Axons are in every neuron and is a long, thin part that transmits impulses to other neurons from bulb-shaped structures called axon terminals or terminal buttons. c. i. 3. a. Myelin is a fatty substance that encases and insulates axons, facilitating transmission of neural impulses c. i. 3. b. The fat insulates the axon from ions that are found in the fluids that surround the nervous system c. i. 3. c. The myelin sheath minimizes leakage of the electrical current, allowing messages to be conducted more efficiently. c. i. 3. d.
