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Question

Which event does NOT happen during ventricular diastole?

Answer

Throughout the period of relaxation of the ventricles, the second heartbeat cannot be heard. In this circumstance, option D is the best choice. Diastole is the time interval when the myocardium cannot contract or shorten, and it needs to recover from rest. The process of relaxation is induced by various energetically demanding processes, such as calcium release from troponin C, dissociation of the action-myosin cross-bridge, phosphorylation of phospholamban, calcium sequestration into the sarcoplasmic reticulum by the sarcoplasmic reticulum calcium ATPase, sodium/calcium exchanger-induced calcium extrusion from the cytoplasm, and extension of the 23-27. Sufficient energy availability and replenishment capability are required to perform this process at an adequate rate and scale. The speed and consistency of these cellular activities regulate active ventricular relaxation fully. The complete question is: which event does NOT occur during ventricular diastole? (A) Blood is pushed into the ventricles by contracting atria. (B) AV valves close due to contracting ventricles. (C) Blood flows from the atria into the ventricles. (D) The second sound of the heart is heard. For more information on ventricular diastole, please click on the provided link: brainly.com/question/902007 #SPJ4.