CPE Anatomy & Physiology of Hair Growth 3

Question 1

Which layer immediately surrounds the outer root sheath and consists of a thickened basement membrane?

Accepted Answer

Glassy membrane (vitreous layer)

Answer

The glassy membrane, also called the vitreous layer, is a hyaline basement membrane that forms the outermost boundary of the follicle separating it from the dermis.

Question 2

In electrology, the dermal papilla is the primary treatment target because it:

Accepted Answer

Contains the blood supply and signals that sustain hair growth

Answer

The dermal papilla contains the vasculature and inductive mesenchymal cells that signal the matrix to produce hair; its destruction leads to permanent hair removal.

Question 3

What percentage of scalp follicles are typically in anagen at any given time?

Accepted Answer

85–90%

Answer

At any given time, approximately 85–90% of scalp hair follicles are in the anagen (active growth) phase.

Question 4

Melanocytes in the hair follicle are concentrated in the:

Accepted Answer

Bulb matrix surrounding the papilla

Answer

Follicular melanocytes reside in the matrix of the hair bulb and transfer melanin granules to cortical cells during anagen.

Question 5

The sebaceous gland is a type of:

Accepted Answer

Holocrine gland

Answer

Sebaceous glands are holocrine glands that release sebum by complete cell disintegration.

(CPE) Certified Professional Electrologist Practice Test

(CPE) Certified Professional Electrologist Practice Test

CPE Anatomy & Physiology of Hair Growth 3