Which of the following ions has a direct effect on ventricular muscle contraction?
A) Sodium
B) Potassium
C) Magnesium
D) Calcium
Correct Answer:
Verified
Q2: The cardiac cell at rest has what
Q3: The normal ST segment is
A)at the isoelectric
Q4: The T wave represents
A)atrial depolarization.
B)atrial repolarization.
C)ventricular depolarization.
D)ventricular
Q5: The term repolarization refers to the
A)heart's mechanical
Q6: The ST segment is located between the
A)P
Q7: +20 mV is the
A)resting transmembrane potential.
B)transmembrane potential
Q8: The relative refractory period extends from the
A)beginning
Q9: The PR segment is located between the
A)P
Q10: In the action potential,phase 3 is
A)depolarization.
B)rapid repolarization.
C)plateau.
D)rest.
Q11: The baseline on the EKG strip is
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