Papillary muscle extension is responsible for:
Correct answer: B. All of these
- A. Mitral contraction
- B. All of these
- C. Bicuspid contraction
- D. Tricuspid contraction
Explanation
The cusps of the valves are attached to the papillary muscles which are extensions of the wall of the ventricles through fibrous cords called chordae tendinae. Contraction of papillary muscles controls the opening and closing of valves. When they contract, the valves become closed. Bicuspid valve is also called mitral valve.
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