PSYC 100 Study Guide - Midterm Guide: Midbrain, Occipital Lobe, Dextroamphetamine

• School: Simon Fraser University
• Department: Psychology
• Course: PSYC 100
• Professor: Patrick Carolan

Document Summary

Neurons (about 100 billion in the body, 80 billion within central nervous system) Soma (cell body): integrate signals from dendrites; nucleus; protein synthesis. Dendrites: receive inhibitory or excitatory input from other cells. As many as a thousand coming out of cell body. Axons: transmit information to other cells; neurotransmitters released at terminal buttons. The very end of the cell body. Action potentials (intra-cell electrical conduction) -within a given neuron. Start at dendrite move thru the cell body to the axon and to the terminal buttons. Myelin sheath: fatty layer of the axon, composed by glial cells; feeding neurons, generating neurons. Nodes of ranvier (gaps in between the myelin sheath) are not insulated by myelin sheath. Axons from one neuron connect to dendrites from another neuron. Axon wont physically connect with the dendrite (a small gap- synaptic gap) A neuron can receive inputs from different type of cells but neuron can only admit one type of neurotransmitter.