SPLH 620 Exam 1 Questions and Answers 100% Correct(GRADED A+)
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Module
SPLH 620
Institution
SPLH 620
3 types of neuroglia - ANSWER-astrocytes, oligodendrocytes, microglia
Astrocytes CNS - ANSWER-Clean up local debris including dead neurons
Provide nutrients
Regulate chemical composition of extracellular fluid
Oligodendrocytes CNS - ANSWER-Provide support for axons
Produce myelin sheath to...
SPLH 620 Exam 1 Questions and Answers 100% Correct(GRADED A+)
3 types of neuroglia - ANSWER-astrocytes, oligodendrocytes, microglia
Astrocytes CNS - ANSWER-Clean up local debris including dead neurons
Provide nutrients
Regulate chemical composition of extracellular fluid
Oligodendrocytes CNS - ANSWER-Provide support for axons
Produce myelin sheath to cover axons (on neuron) in CNS, covering multiple at a time
Schwann Cells PNS - ANSWER-Support cells
Produce myelin to cover axons (on neuron) in PNS, only covers one axon at a time
Each cell provides myelin for one neuron
What is exocytosis? - ANSWER-presynaptic process - when the synaptic vesicles are released and fuse to membrane
Depolarization - ANSWER-Becomes more positive leading to action potential -70 to -55
Hyperpolarization - ANSWER-membrane potential becomes more negative, less likely for action potential -120
Spatial summation - ANSWER-*multiple* synapses firing at *different* locations at *one time* to create a net effect.
Temporal Summation - ANSWER-Transmit impulses in rapid-fire order
Process of chemical synapse - ANSWER-Transmission of AP toward axon terminal
Opening of Ca++ channels
Exocytosis
Neurotransmitter binding
Opening of Na+ and/or K+ channels
Generation of PSP
Acetylcholine - ANSWER-excitatory
Glutamate - ANSWER-*most abundant*
excitatory
GABA - ANSWER-*most abundant*
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