HOSA Dental Terminology Practice

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Which statement correctly describes an agent that is "vasodilator"?

  1. An agent that constricts blood vessels

  2. An agent that stimulates bone growth

  3. An agent that causes dilation of blood vessels

  4. An agent that enhances tooth sensitivity

The correct answer is: An agent that causes dilation of blood vessels

A vasodilator is defined as an agent that causes the relaxation and widening of blood vessels. When blood vessels dilate, the flow of blood is increased, which can lower blood pressure, improve blood flow to tissues, and enhance the delivery of oxygen and nutrients throughout the body. This mechanism is critical in various physiological processes, including the regulation of body temperature and the distribution of blood to different organs during times of need, such as exercise or recovery from injury. The other options reference functions unrelated to blood vessel dilation. Constricting blood vessels, stimulating bone growth, and enhancing tooth sensitivity do not involve the widening of blood vessels, which is why they do not accurately describe a vasodilator.

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