HOSA Dental Terminology Practice

A Vasoconstrictor is known to perform which function?

1. Widen blood vessels

2. Constrict blood vessels

3. Increase blood flow

4. Reduce blood pressure

The correct answer is: Constrict blood vessels

A vasoconstrictor is a substance that causes blood vessels to narrow or constrict. This action decreases the diameter of the blood vessels, which results in reduced blood flow in that area. Vasoconstriction can lead to an increase in blood pressure, as the same volume of blood is forced through a narrower space, thereby increasing the resistance in the vascular system. This function is crucial in various physiological processes, including regulating body temperature and managing blood pressure in response to different stimuli. Understanding the role of vasoconstrictors is essential in dental care, particularly in procedures involving anesthesia, where controlling blood flow is important for both the effectiveness of the anesthetic and minimizing bleeding.