The flaps of the tricuspid valves are attached to muscular extensions of the right ventricle known as:
Correct answer: B. Papillary Muscles
- A. Smooth Muscles
- B. Papillary Muscles
- C. Intercostal Muscles
- D. Skeletal Muscles
Explanation
This option is the correct answer. The flaps of the tricuspid valves are attached to muscular extensions of the right ventricle known as papillary muscles. Papillary muscles are specialized muscles located within the ventricles of the heart. They are connected to the tricuspid valve by cord-like structures called chordae tendineae. The contraction of the papillary muscles prevents the backflow of blood by keeping the tricuspid valve closed during ventricular contraction.
This question appeared on the UHS MDCAT 2015 paper, which you can sit online with every answer explained.
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