SPLH 620 Exam Questions and Answers 100% Correct!!

cell body fxn - ANSWER-integrate signals dendrite fxn - ANSWER-receive signals axon fxn - ANSWER-conduit to send signals parts of CNS - ANSWER-brain and spinal cord parts of PNS - ANSWER-somatic and autonomic systems glial cell fxns - ANSWER-physical support, nutrient flow, nerve housekeeping astrocyte fxn and location - ANSWER-clean up local debris, provide nutrients, regulate external chemical composition, CNS oligodendroglia fxn and location - ANSWER-provide support for axons, produce myelin sheath, 1:many ratio, CNS microglia fxn and location - ANSWER-smallest glial cell, protect brain from invading organisms, CNS, immune cell schwann fxn and location - ANSWER-support cell, produce myelin sheath, 1:1 myelin to cell ratio, PNS neuron fxn - ANSWER-information carrier myelination importance - ANSWER-speeds up velocity of conduction neuron signaling simple path - ANSWER-neurotransmitter release to electrical signal through the neuron to neurotransmitter release electrical signaling process between neurons - ANSWER-If excitation threshold goes above -55 mV, an AP is generated. Hyperpolarization occurs as Na+ channels open and Na+ enters the cell. K+ channels open, K+ leaves the cell. At the peak of +40 mV, Na+ channels become refractory and no more enter the cell. Depolarization begins, K+ continues to leave cell, causing charge to decrease to a resting level. K+ channesl close, Na+ channels reset, extra K+ diffuses away absolute