PSI Cosmetology Practice Exam

What is the term for the brief transition period between the growth and resting phases of a hair follicle?

1. Anagen phase

2. Telogen phase

3. Catagen phase

4. Exogen phase

The correct answer is: Catagen phase

The correct answer is the catagen phase. This term refers to the transitional stage that occurs between the active growth phase (anagen phase) and the resting phase (telogen phase) of a hair follicle. During the catagen phase, which typically lasts a few weeks, hair growth slows down, and the hair follicle begins to shrink. This stage signals the end of active hair growth, and it is characterized by a reduction in the number of cells that produce hair. Understanding the hair growth cycle is crucial in fields related to cosmetology, as it affects hair health, treatment approaches, and even product effectiveness. The anagen phase is known for active hair growth, whereas the telogen phase is the resting phase where the hair is not growing but still remains in the follicle before eventually falling out. The exogen phase, while sometimes referenced, is not a standard term commonly used to denote a specific phase of hair growth in educational materials related to cosmetology. Recognizing these stages helps professionals make informed decisions about treatments, hair care, and addressing clients' specific hair concerns.