INBDE (Integrated National Board Dental Examination) Practice Exam

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What vessel plays a key role in controlling blood pressure?

Veins
Venules
Arterioles
Capillaries

The correct answer is: Arterioles

Arterioles play a key role in controlling blood pressure. Arterioles are small blood vessels that branch out from arteries and lead to capillaries. They are capable of constricting and dilating, which allows them to regulate blood flow and pressure throughout the body. By adjusting the diameter of the arterioles, the body can control the amount of blood flowing to different tissues and organs, thereby influencing blood pressure levels. Veins, venules, and capillaries are not primarily involved in regulating blood pressure like arterioles are.