West Virginia Barber Written Practice Exam

Hydrogen bonds make up 35% of the hair's strength. These bonds form between the hydrogen atoms and oxygen atoms in different parts of the same strand of hair, or between hydrogen atoms in one strand and oxygen atoms in another strand. Hydrogen bonds play a crucial role in hair structure as they contribute to its strength and elasticity. Additionally, hydrogen bonds can be disrupted by water or changes in pH, which is why hair can lose its shape or style when exposed to moisture. Disulfide bonds, electrostatic bonds, and peptide bonds are also important in hair structure but do not specifically represent 35% of its strength like hydrogen bonds do.