Barber Practice State Board Practice Exam 2026 - Free Barber State Board Practice Questions and Study Guide

Question: 1 / 400

Which of the following is the primary function of secretory nerve fibers?

Regulating blood flow

Facilitating movement

Regulating sweat and sebum production

The primary function of secretory nerve fibers is to regulate sweat and sebum production. These nerve fibers are responsible for controlling the activities of the sebaceous glands and sweat glands in the skin. When the body needs to cool down, for example, secretory nerve fibers stimulate the sweat glands to produce sweat, which helps to lower the body's temperature through evaporation. Additionally, these fibers can influence the secretion of oils from sebaceous glands, which is crucial for keeping the skin moisturized and protecting it from various external factors.

While regulating blood flow, facilitating movement, and transmitting pain signals are important functions in the body, they pertain to other types of nerve fibers and physiological mechanisms. Secretory nerve fibers are specifically tied to the function of exocrine glands, thus making the regulation of sweat and sebum production their primary role.

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Transmitting pain signals

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