Diastole is

Relaxation of atria

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Relaxation of ventricle

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Contraction of atria and ventricles

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Both A and B.

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Solution

The correct option is C Both A and B.
In the cardiac cycle, diastole is a period of relaxation of the heart muscles (both artia and ventricle). In this process, blood refills in the heart after systole.
So the correct answer will be option D.

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Similar questions

Q. What is the time gap when atria and ventricles both undergo diastole

The cardiac cycle is the sequence of events that occurs when the heart beats. In the __(i)_, the heart ventricles ___(ii)___ and helps fill the heart with blood. In the __(iii)_____ the ventricles ___ _(iv)____and pump the blood to the body through the arteries.

Q. Which of the following events do not occur during joint diastole?

(I) All four–chambers are in relaxed state

(II) Tricuspid and bicuspid are open

(III) Semilunar valves are closed

(IV) Blood from the pulmonary veins and vena cava flows into the left and right ventricles, respectively through the left and right atria

Q. Atria and ventricle can contract at the same time.

Q. Which of the following is correct?

A. Joint diastole- 70% of ventricular filling
B. Ventricular diastole- 25% ventricular filling
C. Isovolumetric contraction- 20% of ventricular filling
D. Isovolumetric relaxation- 30% of ventricular filling

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Diastole is

The correct option is C Both A and B.In the cardiac cycle, diastole is a period of relaxation of the heart muscles (both artia and ventricle). In this process, blood refills in the heart after systole. So the correct answer will be option D.

The correct option is C Both A and B.
In the cardiac cycle, diastole is a period of relaxation of the heart muscles (both artia and ventricle). In this process, blood refills in the heart after systole.
So the correct answer will be option D.