PSYC 211 Chapter Notes - Chapter 2: Second Messenger System, Blood Plasma, Homeostasis
11 Mar 2013
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Document Summary
Sensory neuron: a neuron that detects changes in the external or internal environment and sends information about these changes to the cns. Motor neuron: a neuron located within the cns that controls the contraction of a muscle or the secretion of a gland. Interneuron: a neuron located entirely within the cns. Central nervous system (cns): the brain and spinal cord. Peripheral nervous system (pns): the part of the nervous system outside the brain and spinal cord, including the nerves attached to the brain and spinal cord. Soma: the cell body of a neuron, which contains the nucleus. Dendrite: a branched, treelike structure attached to the soma of a neuron; receives information from the terminal button of an axon and the membrane of another neuron. Synapse: a junction between the terminal button of an axon and the membrane of another neuron. Axon: the long, thin, cylindrical structure that conveys information fro the soma of a neuron to its terminal buttons.
