CDT Skin Anatomy & Physiology 3

Question 1

The papillary dermis differs from the reticular dermis in that it contains:

Accepted Answer

Loose connective tissue and capillary loops

Answer

The papillary dermis is composed of loose connective tissue with capillary loops that nourish the avascular epidermis.

Question 2

Which cells in the skin are responsible for synthesizing and secreting melanin?

Accepted Answer

Melanocytes

Answer

Melanocytes are neural crest-derived cells located in the stratum basale that synthesize melanin in organelles called melanosomes.

Question 3

What is the primary function of the skin's stratum corneum?

Accepted Answer

Barrier against water loss and pathogens

Answer

The stratum corneum consists of dead, flattened corneocytes embedded in lipid lamellae that form the primary barrier against transepidermal water loss and external pathogens.

Question 4

Eccrine sweat glands open directly onto the skin surface and primarily serve to:

Accepted Answer

Regulate body temperature through evaporative cooling

Answer

Eccrine glands secrete hypotonic sweat onto the skin surface where its evaporation dissipates heat and regulates core body temperature.

Question 5

The dermo-epidermal junction (DEJ) is composed primarily of which structural component?

Accepted Answer

Basement membrane with Type IV collagen and laminin

Answer

The DEJ (basement membrane zone) is composed of Type IV collagen, laminin, and other glycoproteins that anchor the epidermis to the dermis.

(CDT) Certified Dermatology Tech Practice Test

(CDT) Certified Dermatology Tech Practice Test

CDT Skin Anatomy & Physiology 3