HUMAN PHYSIOLOGY
BODY FLUIDS AND CIRCULATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The flow of the blood will be immediate slowed down
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The ‘Pace maker’ will stop working
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The blood tends to flow back into the left atrium
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The flow of blood into the pulmonary artery will be reduced
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Detailed explanation-1: -If due to injury the chordae tendineae of the tricuspid valves of the human heart is partially non-functional, the flow of blood into the pulmonary artery is reduced due to backflow of blood into the right atrium.
Detailed explanation-2: -Primary chordae tendineae rupture (CTR) can lead to a total loss of tension of one of the mitral valve leaflets, which then becomes flail. This often leads to abrupt aggravation of the MR, with fainting and/or acute congestive heart failure (CHF).
Detailed explanation-3: -When the chordae tendineae contract, they pull all the three cups downwards thereby opening the tricuspid valve, and hence blood enters the right ventricle. So, if there is some damage to the chordae tendineae, the immediate effect would be the backflow of blood into the atria.
Detailed explanation-4: -When the ventricles contract, pressure gradients across the valves pull the cusps of the mitral and tricuspid valves shut. If there is not enough tension on the chordae tendineae, the cusps may not close properly and blood may leak backwards, or regurgitate.
Detailed explanation-5: -The chordae tendineae prevent the cusps of the AV valves from being shoved up into the atria when the ventricles contract. If this were to happen, blood would regurgitate back into the atria.