3. For each of the following hypothetical conditions, explain: what would happen

Question

3. For each of the following hypothetical conditions, explain: what would happen to the resting membrane potential and why; and what would happen to the action potential (AP) (shape, time to peak, peak voltage, etc.) and why:
a) Na+ channels opened at -45 mV instead of -55 mV
b) Na+ concentrations were initially only twice as great (instead of ten times as great) outside than inside the cell
c) The Na+ channel inactivation time (forced closing time) was longer
d) The Na+/K+ pump ran in the other direction (pumping 3 Na+ in for 2 K+ out)?
e) There were no potassium leak channel

Explanation / Answer

It should definetely be B since is a short-lasting event in which the electrical membrane potential of a cell rapidly rises and falls, following a stereotyped trajectory. Action potentials occur in several types of animal cells, called excitable cells, which include neurons, muscle cells, and endocrine cells. Hope it helps, let me know if you have anymore questions Med Student-source!

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