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Summer Quiz 3a - Once NMDA is active Ca2 enters the cell(in...

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Name _____________________ Bio 365R Vertebrate Physiology Quiz # 3 1-2. What does a second messenger do? Give an example of a second messenger. Relays and amplifies a signal inside the cell. Ex. cAMP 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. Synaptic facilitation 5-6. How do NMDA receptors function? Are they important for LTP and LTD? Glutamate first must activate a number of AMPA receptors to sufficiently depolarize the cell, causing the release of Mg2+ from NMDA (normally blocks it).
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Unformatted text preview: Once NMDA is active Ca2+ enters the cell (in addition to Na+ and K+). This can lead to certain forms of associative LTP. NMDA receptors may also be involved with LTD. 7-8. What’s a major difference between ionotropic receptors and metabotropic receptors? Ionotropic receptors double as an ion channel; metabotropic receptors require an intracellular signal cascade. 9-10. List two characteristics of electrical synapses. (Ex. How is their structure/function different from chemical synapses?) Gap junctions Little delay of signal...
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