Which Labeled Structure in the Figure Carries the Cardiac Action

question 26

Multiple Choice

Which labeled structure in the figure carries the cardiac action potential directly into the contractile fibers of the ventricular myocardium?

• A)A
• B)B
• C)C
• D)D

---

Definitions:

Depressed

A mood disorder marked by significant and persistent feelings of sadness and hopelessness.

Electroconvulsive Therapy (ECT)

A medical treatment most commonly used for severe depression, involving electrical stimulation of the brain under anesthesia.

Severe Depression

A mental health disorder characterized by persistently depressed mood or loss of interest in activities, causing significant impairment in daily life, more intense than general depression.

Obsessive-Compulsive Disorder

A mental health disorder characterized by unwanted repetitive thoughts (obsessions) and actions (compulsions).