16 A Newly Developed Local Anesthetic Blocks Na Channels In Nerves Which Of The Following Effects On The Action Poten 1 (21.46 KiB) Viewed 37 times
16 A Newly Developed Local Anesthetic Blocks Na Channels In Nerves Which Of The Following Effects On The Action Poten 2 (23.57 KiB) Viewed 37 times
16. A newly developed local anesthetic blocks Na+ channels in nerves. Which of the following effects on the action potential would it be expected to produce? Shorten the absolute refractory period Abolish the hyperpolarizing afterpotential O Increase the K+ equilibrium potential O Decrease the Na+ equilibrium potential O Abolish the upstroke of the action potential
12. A 56-year-old woman with severe muscle weakness is hospitalized. The only abnormality in her laboratory values is an elevated serum K+ concentration. The elevated serum K+ causes muscle weakness because? O Na+ channels are opened by depolarization Na+ channels are unresponsive due to depolarization K+ channels are opened by Depolarization the resting membrane potential is hyperpolarized the K+ equilibrium potential is hyperpolarized
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