Medical MCQ-Rapid depolarization (phase 0) of the action potential of ventricular muscle results from opening of:

Rapid depolarization (phase 0) of the action potential of ventricular muscle results from opening of:

Voltage-gated Ca2+ channels

Voltage-gated Na+ channels

Acetylcholine-activated K+ channels

Inward rectifying K+ channels

Question Category:

Physiology

Correct Answer:

Voltage-gated Na+ channels

Description:

Ans. B. Voltage-gated Na+ channelsVoltage-gated Na+ channels are responsible for phase 0 in ventricular muscle. Voltage gated Ca2+ channels are responsible for phase 0 in nodal cells. The potassium channels mentioned do not play a role in mediating depolarization.

Previous MCQ

Next MCQ

Get More

Subject Mock Tests

Try practicing mock tests with over 200,000 questions from various medical subjects.

Attempt a mock test now

Mock Exam

Attempt an exam of 100 questions randomly chosen from all subjects.

Coming Soon