Given below are four statements (i-iv) regard | vedclass

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(A) Statement $(i)$ is correct: Arteries have thick muscular walls and a narrow lumen to withstand high blood pressure,whereas veins have thin walls a

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$(i)$ and $(iv)$

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(A) Statement $(i)$ is correct: Arteries have thick muscular walls and a narrow lumen to withstand high blood pressure,whereas veins have thin walls and a wider lumen.Statement $(ii)$ is incorrect: Angina pectoris is acute chest pain that occurs when not enough oxygen reaches the heart muscle,not the brain.Statement $(iii)$ is incorrect: Persons with blood group $AB$ are universal recipients,not universal donors,because they lack anti-$A$ and anti-$B$ antibodies in their plasma.Statement $(iv)$ is correct: Calcium ions $(Ca^{2+})$ are essential cofactors in the blood clotting cascade,facilitating the conversion of prothrombin to thrombin.Therefore,statements $(i)$ and $(iv)$ are correct.

Similar Questions

Statement-$I$ :- The body has the ability to alter the stroke volume as well as heart rate and thereby the cardiac output.
Statement-$II$ :- During each cardiac cycle two prominent sounds are produced which can not be easily heard through a stethoscope.

Select the correct option regarding the circulatory system.

The blood bank of the body or the reservoir where blood is stored and can be mobilized is:

All of the following are vasoconstrictor agents except:

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