PSYC 1010 Chapter Notes -Brainstem, Substance P, Peripheral Nervous System

• School: York University
• Department: Psychology
• Course: PSYC 1010
• Professor: Rebecca Jubis

Document Summary

November 22 2011 - the nervous system pp. Nervous system: the body"s neuron-based master control system; it works together with the endocrine system. 90% of the nervous system consists of glia cells which help maintain the proper concentrations of vital ions in the fluid around neurons and assist in the formation of connections between brain neurons. Neurons are the communication lines of the nervous system. Sensory neurons: a neuron that collects information about a stimulus and relays it to the spinal cord and brain. Interneuron: a neuron in the spinal cord or brain that receives sensory input, processes it, and sends signals to other neurons. Moter neurons: a neuron that relays signals from interneurons to muscles and glands effectors that carry out responses. Dendrite: a short, branching extension of a neuron that receives incoming signals ( input zones ) Axon: the extension of a neuron that conducts signals away from the neuron.