1.

Systolic pressure of heart is higher than diastolic pressure, because      

A. Blood is forcefully pumped into arteries by the heart during systole and not during diastole.
B. Arteries offer resistance to the flowing of blood during systole only.
C. Arteries contract during systole only.
D. Volume of blood in heart is greater during systole than during diastole.
Answer» B. Arteries offer resistance to the flowing of blood during systole only.


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