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NWHSU PNS - EXAM 3 Questions and Answers (100% Pass)

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NWHSU PNS - EXAM 3 Questions and Answers (100% Pass)

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  • October 29, 2024
  • 41
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • NWHSU
  • NWHSU
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NWHSU PNS - EXAM 3 Questions
and Answers (100% Pass)
Counteracts Morphine - opioid narcotics.


✓ Narcan / naloxone




Transmitters which cause FAST potentials, and what site do they work at?


✓ -ACh @ Nicotinic Cholinergic sites

✓ -Glutamate @ NMDA & AMPA sites

✓ -GABA @ GABAa sites




NMDA vs AMPA receptors


✓ Both are like Na/K pumps, but NMDA also let's Ca++ in. AMPA may

amplify NMDA.




Is M2 part of direct or indirect (second messenger) system? Slow/fast?


✓ Indirect (G-protein coupled receptor)

✓ -Slow




CN X will have (positive/negative) chronotropic and ionotropic effect.




Master01 | October, 2024/2025 | Latest update

, 1|Page | © copyright 2024/2025 | Grade A+

✓ Negative - lower heart rate and contractility.




A sIPSP will do what to the heart?


✓ lower rate and contractility.




Which nerve and side is primarily responsible for maintaining resting heart

rate?


✓ Right Vagus.




In a g-coupled receptor system, it is common for the end of the chain to

activate a protein kinase A, which causes this type of potential

______________, by doing this to the membrane ________________.




What channel needs to open for this to happen?


✓ sIPSP by phosphorylating (adding phosphates) to the inside of the

membrane.



✓ NO CHANNEL IS NECESSARY IN THIS SPECIFIC EXAMPLE!




What do all slow potentials require?




Master01 | October, 2024/2025 | Latest update

, 1|Page | © copyright 2024/2025 | Grade A+

Do all of these result in a membrane potential change?


✓ A second messenger is needed.



✓ Not all 2nd messengers result in change in potential.




Epinephrine is this class of molecule:


✓ catecholamine




PK-A stands for


✓ protein kinase a




The response from PK-A is (+ or -)


✓ +++ excitatory




Beta 1 (________) receptors do what? They are mostly in this spot:


✓ (adrenergic)

✓ increase heart rate, mostly on the AV node.




The AV is dominated by _______ effect


The SA node is dominated by _________ effect.


Master01 | October, 2024/2025 | Latest update

, 1|Page | © copyright 2024/2025 | Grade A+




Choose autonomic response.


✓ The AV is dominated by __sympathetic__ effect



✓ The SA node is dominated by ____parasympathetic_____ effect.




(T/F)


All 2nd messengers result in slow potentials


✓ False. A b-1 receptor causes contraction, for example by acting

INTRAcellularly.




Main examples of 2nd messenger systems causing:


sIPSP


sEPSP


✓ sIPSP - M2

✓ sEPSP - Substance P




Other than potentials, what can 2nd messengers do?




Master01 | October, 2024/2025 | Latest update

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