MHT CET · BIOLOGY · STD 12 - 8. Respiration and Circulation
Rise in blood pressure is directly related to the following EXCЕРТ ________.
- A length of the blood vessel
- B venous return
- C vasoconstriction
- D vasodilation
Answer & Solution
Correct Answer
(D) vasodilation
Step-by-step Solution
Detailed explanation
i. Vasoconstriction: narrows blood vessels → increases BP
ii. Venous return: more blood back to heart → raises cardiac output and BP
iii. Longer vessel length: more resistance → higher BP
iv. Vasodilation: widens vessels, reducing resistance and lowering BP
ii. Venous return: more blood back to heart → raises cardiac output and BP
iii. Longer vessel length: more resistance → higher BP
iv. Vasodilation: widens vessels, reducing resistance and lowering BP
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