NEET · Biology · STD 11 - 15. Body fluids and criculations

Blood pressure in the mammalian aorta is maximum during

A systole of the left ventricle
B diastole of the right atrium
C systole of the left atrium
D diastole of the right ventricle.

Verified Solution

Answer & Solution

Correct Answer

(A) systole of the left ventricle

Step-by-step Solution

Detailed explanation

(a) : The temporary rise in blood pressure during the contraction of the heart is called systolic pressure and the temporary fall in blood pressure during relaxation of the heart is called diastolic pressure. Blood pressure is expressed as the ratio of the systolic pressure over the diastolic pressure. For a healthy resting adult person, the average systolic/diastolic pressures are \(120/80\ mmHg\). Aorta is directly supplied by left ventricle thus, the blood pressure in aorta is highest during systole of left ventricle. During it, left ventricle contracts and pushes blood into aorta.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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