Summer Quiz 4a - Synaptic facilitation 5-6. What ions are...

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Name _____________________ Bio 365R Vertebrate Physiology Quiz # 4 1-3. How does regeneration differ between the PNS and CNS? In the PNS, macrophages clear cellular debris of the distal stump where Schwann cells promote regeneration and growth cone forms at proximal end that grows past the cut site. In the CNS, migroglia clear the cellular debris of the distal stump. Inhibitory factors in the environment (myelin-associated glycoproteins) prevent axonal growth past the cut site. 4. A long-term increase in synaptic strength, most likely due to residual Ca++ in presynaptic terminals is called: a. LTP b. sensitization c. habituation d.
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Unformatted text preview: Synaptic facilitation 5-6. What ions are conducted by NMDA receptors? What is the ion that blocks NMDA receptors extracellular? Ca2+ ions are conducted in addition to Na+ and K+; Mg2+ blocks 7-8. What is polyethylene glycol (PEG)? How has it been used for axonal repair? It is polymer that induces adjacent membranes to flow into one another, causing a fusion of plasma membranes 9-10. What are some common misconceptions about degenerating/regenerating axons? Ex.-Severance of an axon causes a rapid degeneration of the distal segment-All trophic support to axons comes from transport from the perikaryon....
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