alleryStart learning →Besides the bundle branches, which band carries the impulse to the right papillary muscle?
AThe septal band
BThe arcuate band
CThe coronary band
DThe moderator band
Answer & Solution
Correct answer: D. The moderator band
1. After the AV bundle and branches, the impulse also takes a shortcut on the right.
2. It reaches the right papillary muscle via the moderator band.
3. Early papillary activation braces the tricuspid valve before ventricular pressure rises.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 19 "The Cardiovascular System: The Heart", section 19.2 Cardiac Muscle and Electrical Activity_
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