MEDICAL
HEART AND PERICARDIUM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Contraction of the heart is done by the
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epipericardium
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visceral pericardium
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pericardium
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myocardium
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Explanation:
Detailed explanation-1: -Myocardial contraction occurs at the myofibrillar level by regulated interactions between actin and myosin. Cardiac troponins (cTns) serve various roles in such regulation, including troponin C (cTnC) in calcium binding, troponin I (cTnI) in inhibition, and troponin T (cTnT) in tropomyosin binding.
Detailed explanation-2: -Contraction in cardiac muscle occurs due to the the binding of the myosin head to adenosine triphosphate ( ATP ), which then pulls the actin filaments to the center of the sarcomere, the mechanical force of contraction.
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