PSYC 101 Midterm: psych 101 midterm 2
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PSYC 101 Full Course Notes
Verified Note
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Document Summary
Sensory take info from receptors to cns. Motor take info from cns to muscles and glands. Interneurons have two functions: connect two other neurons, communicate between brain neurons, maintain brain structure, assisted by glia. Role in immune system (attacking micro-organisms: anatomy. Dendrite: can accept other axons" tb"s on dendritic spine or directly. Cell body, or soma: metabolism and maintenance functions, makes up majority of grey matter. Axon: has a myelin sheath, which insulates and prevents tangled action potentials, = fatty/protein tissue layer, lots in white matter, breaks down in multiple sclerosis, which is an autoimmune disease. Causes muscle coordination breakdown and then dementia. Attacks a protein in myelin sheath in cns: each sausage is a separate neuron, increases speed. =brief electric charge that travels down axon. Depolarization (to +40 mv), repolarization overshoots (refractory period where cell cannot fire) Has a crucial threshold around -55 mv.
