What is the primary cause of the plateau phase in the cardiac muscle action potential?
AThe movement of fewer sodium ions across the cell membrane
BThe calcium channels remaining open longer than the sodium channels
CThe increased membrane permeability to potassium ion
DA decrease in the amount of calcium diffusing across the membrane
Equilibrium potential of calcium is
A+130mV
B-32mV
C+65mV
D-95mV
Which of the following statements about the Na-K pump is false?
AIt is not directly involved in the generation of action potentials.
BIt is electrogenic
CIt needs ATP for its functioning
DIt is located on the apical membrane of cell
+ 7 more in the PDF
Browse all chapters