Refer to the graph, which shows ventricular muscle fiber membrane activity. Which statement about the graph is false?
A) The activity shown in curve 1 is initiated by the opening of voltage-gated sodium channels.
B) Curve 1 depicts an action potential for ventricular muscle.
C) The extended plateau of curve 1 is due to sustained opening of voltage-gated calcium channels.
D) The activity shown in curve 2 depicts the relative permeability of the membrane to sodium ions.
E) The activity shown in curve 3 depicts the relative permeability of the membrane to potassium ions.

Question

Refer to the graph, which shows ventricular muscle fiber membrane activity.  Which statement about the graph is false?
A) The activity shown in curve 1 is initiated by the opening of voltage-gated sodium channels. 
B) Curve 1 depicts an action potential for ventricular muscle. 
C) The extended plateau of curve 1 is due to sustained opening of voltage-gated calcium channels. 
D) The activity shown in curve 2 depicts the relative permeability of the membrane to sodium ions. 
E) The activity shown in curve 3 depicts the relative permeability of the membrane to potassium ions.

Quizplus · Accepted Answer

The Answer of Refer to the graph, which shows ventricular muscle fiber membrane activity.  Which statement about the graph is false?
A) The activity shown in curve 1 is initiated by the opening of voltage-gated sodium channels. 
B) Curve 1 depicts an action potential for ventricular muscle. 
C) The extended plateau of curve 1 is due to sustained opening of voltage-gated calcium channels. 
D) The activity shown in curve 2 depicts the relative permeability of the membrane to sodium ions. 
E) The activity shown in curve 3 depicts the relative permeability of the membrane to potassium ions.

Refer to the Graph, Which Shows Ventricular Muscle Fiber Membrane