Dr. Kevorkian invented an assisted suicide machine that consisted of nothing mor
ID: 36293 • Letter: D
Question
Dr. Kevorkian invented an assisted suicide machine that consisted of nothing more than raising the level of K+ in your extracellular fluid (after anesthesia). Which of the following best describes what will happen to your neurons as a result.
more K+ leaves the neuron making the membrane potential more positive (depolarized)
more K+ stays inside the neuron making the Em more negative and the cell easier to excite
K+ leaves the neuron less readily making the Em more +, activating voltage-gated Na+ channels in exciteable tissues
K+ leaves the neuron more readily making the membrane potential more negative
more K+ leaves the neuron making the membrane potential more negative (hyperpolarized)
a.more K+ leaves the neuron making the membrane potential more positive (depolarized)
b.more K+ stays inside the neuron making the Em more negative and the cell easier to excite
c.K+ leaves the neuron less readily making the Em more +, activating voltage-gated Na+ channels in exciteable tissues
d.K+ leaves the neuron more readily making the membrane potential more negative
e.more K+ leaves the neuron making the membrane potential more negative (hyperpolarized)
Explanation / Answer
more K+ stays inside the neuron making the Em more negative and the cell easier to excite
b.more K+ stays inside the neuron making the Em more negative and the cell easier to excite
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