CPE Anatomy & Physiology of Hair Growth 4

Question 1

During catagen, the follicle shortens primarily because of:

Accepted Answer

Programmed apoptosis of matrix and lower follicle cells

Answer

Catagen regression is driven by apoptosis of the epithelial cells in the lower follicle, causing the follicle to shrink upward toward the bulge.

Question 2

Vellus hairs differ from terminal hairs in that they:

Accepted Answer

Have little or no medulla and lack significant pigmentation

Answer

Vellus hairs are fine, short, and lightly pigmented with a thin or absent medulla, unlike the thicker, pigmented terminal hairs.

Question 3

The hair medulla, when present, is composed of:

Accepted Answer

Loosely packed keratinized cells with air spaces

Answer

The medulla is the innermost hair layer consisting of loosely arranged, partially keratinized cells with intercellular air spaces, which give coarse hairs their opacity.

Question 4

What is the approximate duration of the telogen phase for scalp hair?

Accepted Answer

2–4 months

Answer

Scalp telogen typically lasts about 2–4 months before anagen re-initiates and the old club hair is shed.

Question 5

The pilosebaceous unit consists of:

Accepted Answer

Hair follicle, sebaceous gland, and arrector pili muscle

Answer

The pilosebaceous unit is made up of the hair follicle, the associated sebaceous gland, and the arrector pili smooth muscle.

(CPE) Certified Professional Electrologist Practice Test

(CPE) Certified Professional Electrologist Practice Test

CPE Anatomy & Physiology of Hair Growth 4