1.2 Action Potential in Cardiac Muscle
Cards (23)
- What is the average action potential recorded in a ventricular muscle fiber?
- What is the intracellular potential in ventricular muscle fibers between beats?
- What is the intracellular potential during each beat in ventricular muscle fibers?
- How long does the membrane remain depolarized during the action potential?
- How much longer does ventricular contraction last in cardiac muscle compared to skeletal muscle?
- What are the major differences between cardiac and skeletal muscle action potentials?
- What causes the action potential in skeletal muscle?
- How long do fast sodium channels remain open in skeletal muscle?
- What happens at the end of fast sodium channel closure in skeletal muscle?
- What types of channels cause the action potential in cardiac muscle?
- How do L-type calcium channels differ from fast sodium channels?
- What ions flow through L-type calcium channels during cardiac action potential?
- What effect does calcium influx have during the plateau phase of cardiac action potential?
- What happens to potassium ion permeability immediately after the action potential begins in cardiac muscle?
- What is the consequence of decreased potassium permeability during the action potential plateau?
- What happens when slow calcium-sodium channels close?
- What is the average resting membrane potential in cardiac muscle?
- What is the velocity of conduction of the action potential in cardiac muscle fibers?
- How does the conduction velocity in Purkinje fibers compare to cardiac muscle fibers?
- What is the refractory period of the ventricle in cardiac muscle?
- How does the refractory period of atrial muscle compare to that of ventricular muscle?
- What is the duration of the relative refractory period in cardiac muscle?
- What can cause a premature contraction in cardiac muscle?