CME Anatomy & Physiology Fundamentals 3

Question 1

The infundibulum of the hair follicle extends from the skin surface to the opening of which gland?

Accepted Answer

Sebaceous gland

Answer

The infundibulum is the uppermost segment of the hair follicle, extending from the skin surface down to the opening of the sebaceous gland.

Question 2

Which skin cell type produces the pigment responsible for hair and skin color?

Accepted Answer

Melanocytes

Answer

Melanocytes are specialized cells in the stratum basale that synthesize melanin and transfer it to surrounding keratinocytes.

Question 3

What is the name of the region of the hair follicle between the sebaceous gland duct and the arrector pili muscle insertion point?

Accepted Answer

Isthmus

Answer

The isthmus is the middle segment of the hair follicle located between the sebaceous gland opening and the arrector pili muscle attachment.

Question 4

Which epidermal layer is the site of continuous cell division (mitosis) that replenishes upper skin layers?

Accepted Answer

Stratum basale

Answer

The stratum basale (basal layer) contains stem cells and is the only epidermal layer where keratinocytes actively divide by mitosis.

Question 5

Vellus hair differs from terminal hair primarily in that it is:

Accepted Answer

Shorter, finer, and lacks a medulla

Answer

Vellus hair is short, fine, lightly pigmented, and typically lacks a medulla, while terminal hair is longer, coarser, and fully pigmented.

(CME) Certified Medical Electrologist Practice Test