PSI Cosmetology Practice Exam

What is a common characteristic of healthy hair?

1. Low elasticity

2. High porosity

3. Strong and resilient

4. Poor color retention

The correct answer is: Strong and resilient

Healthy hair is characterized by strength and resilience. This means that it has the ability to withstand manipulation, such as styling and environmental factors, without breaking or sustaining damage. Strong hair indicates that the hair's structure is intact, with a well-maintained cuticle layer that protects the inner layers of the hair shaft. In addition to strength, healthy hair typically has good moisture balance, which contributes to its flexible nature. This elasticity allows hair to stretch without snapping. Furthermore, healthy hair usually has lower porosity, meaning it can effectively retain moisture without allowing too much water or chemicals to penetrate and weaken its structure. Other characteristics mentioned, such as low elasticity, high porosity, or poor color retention, are generally signs of damage or unhealthy hair. Low elasticity can signify brittleness, while high porosity indicates that the hair is overly porous and may easily lose moisture. Poor color retention suggests damage to the hair, affecting its ability to hold color effectively. Therefore, strength and resilience are key indicators of healthy hair.