PSY100H1 Final: PSY100 exam
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PSY100H1 Full Course Notes
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Document Summary
Axon hillock: base of cell body will cause neuron to fire if enough stimulation is received. Axon: transports information from cell body to end of neuron through electrochemical reactions. Sensory neurons: receive and bring information toward the brain. Motor neurons: send information away from brain to muscles. Glial cells: mount immune responses in the brain, remove waste, synchronize activity of neurons. (10:1 ratio) Resting potential: neurons initially are negatively charged by large concentrations of chloride ions surrounded by high concentrations of positive sodium and potassium ions on the outside. Action potential: ion channels open, and positive ions rush in stimulating a wave of electrical energy. Hyperpolarized: active transport pumps out positive ions increasing the negative ion concentration inside the neuron above normal levels making it less likely to fire. Refractory period: 2-3ms to let neuron return to original state. Synaptic cleft: minute space between terminal button and dendrite.
