PSYC 200 Study Guide - Midterm Guide: Sympathetic Nervous System, Ernest Mcculloch, Autonomic Nervous System
26 Oct 2016
School
Department
Course
Professor
Document Summary
Neuroscience: the study of the brain and nervous system. Neuron: a nerve cell fundamental building block of nervous system: sensory: gathers sensory information (temperature, pain, pressure, etc, motor: communicates information to the muscles, interneuron: carries information between neurons in the brain and the spinal cord. Dendrites: receive input from other neurons branch like structures. Axon: carries information away from cell body to other neurons. Axon terminal: end of neurons axon, where neurotransmitters are released. Nodes of ranvier: nodes on axon without myelin sheath, action potentials jump node to node. Multiple sclerosis: degenerative disease of myelin on axons vision loss, pain, muscle weakness. Resting potential: neuron is at rest it is negatively charged inside (intracellular) relative to outside (extracellular). -70 mv = polarized. Action potential: sudden positive change in electrical charge of a neurons axon ( ring), rapidly transmitted down the axon (na+ rush into cell) Threshold: point in which neurons much reach in order to initiate action potential.
