Medical Sciences

at a Glance

Michael Randall

Multiple Choice

Question 1.Which biophysical property of the plasma membrane means that potassium plays a major role in determining the resting membrane potential:

(a) K+ (but not Na+) is soluble in the plasma membrane
(b) The activation of voltage-operated Na+ channels
(c) The membrane is more permeable to K+ compared with Na+
(d) The sodium pump (3Na+/2K+ ATPase) is electrogenic
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