Texas Barber Exam Practice Test

What do water, shampooing, and acid solutions break?

1. Sweat glands

2. Blow dryer

3. Hydrogen bonds

4. Arrector pili muscle

The correct answer is: Hydrogen bonds

Water, shampooing, and acid solutions do not break sweat glands, blow dryers, or the arrector pili muscle. These substances can, however, break hydrogen bonds. Hydrogen bonds are chemical bonds that hold molecules of water and other substances together. When these bonds are broken, it can cause substances to change states, like when water freezes or evaporates. In the case of shampooing and acid solutions, breaking hydrogen bonds can also help to break down and remove dirt and oils from the hair and scalp. Therefore, the correct answer is C.