CDT Skin Anatomy & Physiology 2

Question 1

Which layer of the epidermis contains the stem cells responsible for continuous skin renewal?

Accepted Answer

Stratum basale

Answer

The stratum basale (basal layer) contains mitotically active stem cells that continuously divide to replenish the epidermis.

Question 2

Meissner's corpuscles are sensory receptors primarily located in which skin region?

Accepted Answer

Dermal papillae of hairless skin

Answer

Meissner's corpuscles are encapsulated mechanoreceptors found in the dermal papillae of glabrous (hairless) skin, detecting light touch.

Question 3

What type of collagen predominates in the reticular dermis and provides tensile strength to the skin?

Accepted Answer

Type I collagen

Answer

Type I collagen is the most abundant collagen in the reticular dermis and is responsible for the skin's tensile strength.

Question 4

Which skin appendage is responsible for producing the oily substance that lubricates hair and skin?

Accepted Answer

Sebaceous gland

Answer

Sebaceous glands produce sebum, an oily secretion that lubricates hair shafts and the skin surface.

Question 5

The Langerhans cells found in the epidermis function primarily as:

Accepted Answer

Antigen-presenting immune cells

Answer

Langerhans cells are dendritic antigen-presenting cells that play a key role in the skin's immune surveillance.

(CDT) Certified Dermatology Tech Practice Test