PSY 1012 Study Guide - Quiz Guide: Myelin, Peripheral Nervous System, Axon Terminal
Document Summary
The fact that neurons fire down the complete length of the cell if a sufficient level of excitatory impulses are received: soma. The cell body containing the nucleus: neurotransmitters. Chemicals present in the brain that allow for message transmission among nerve cells: endorphins. Brain chemicals that moderate pain messages and produce feelings of pleasure: neurons. Fibers extending out from the soma of the neuron; receive incoming messages from adjoining neurons: motor neurons. Neurons in the peripheral nervous system that transport messages from spinal cord to muscles and glands: nodes of ranvier. Tiny gaps within the myelin sheath covering a nerve cell; may help speed impulses: synapse. The connection between neurons where neural message becomes chemical (carried by neurotransmitters: axon. The part of the neuron conducting messages down the length of the cell toward connections with other neurons; usually the longest part of the neuron: myelin sheath.
