Blood pressure in the mammalian aorta is maximum during

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systole of the left atrium

systole of the left ventricle

diastole of the right atrium

diastole of the right ventricle

answer is A.

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Detailed Solution

The aorta carries blood away from the left ventricle to various parts of the body. Blood pressure in the mammalian aorta
is maximum during systole of the left ventricle. Systolic pressure is the highest pressure in the aorta (120 mm Hg) which occurs during the contraction of the left ventricle. It represents the pressure of blood in the aorta when the ventricles are pumping out blood. Diastolic pressure is the lowest pressure in the aorta (80 mm Hg) which occurs during the relaxation of the left ventricle. It represents the pressure of blood in the aorta when the ventricles are receiving blood.

(2) Diastole of right atrium coincides with both ventricular systole and joint diastole.

(3) During systole of the left atrium, the left ventricle is still in diastole and the blood pressure in the aorta is minimum (80 mm Hg).

(4) Blood pressure in the aorta is minimum (80 mm Hg) during the diastole of the left ventricle.

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