Integumentary system Knowledge-Based Download PDF

Questions

1. 1.

   Which epidermal cells synthesize the pigment responsible for skin color and transfer it within melanosomes to neighboring keratinocytes to protect nuclear DNA from ultraviolet radiation damage?

   • A) Merkel cells
   • B) Dermal fibroblasts
   • C) Melanocytes
   • D) Keratinocytes
2. 2.

   Which cutaneous exocrine glands discharge an oily lipid mixture called sebum into hair follicles to lubricate the skin, reduce water loss, and inhibit bacterial growth?

   • A) Sebaceous glands
   • B) Eccrine sweat glands
   • C) Apocrine sweat glands
   • D) Ceruminous glands
3. 3.

   Which specialized immune cells located within the epidermis act as antigen-presenting cells to alert the adaptive immune system of cutaneous pathogens?

   • A) Langerhans cells
   • B) Merkel cells
   • C) Melanocytes
   • D) Keratinocytes
4. 4.

   Which epidermal layer consists of a single row of actively dividing stem cells that continually produce new keratinocytes to renew the skin?

   • A) Stratum corneum
   • B) Stratum granulosum
   • C) Stratum basale
   • D) Stratum spinosum
5. 5.

   Which layer of the human integumentary system is primarily composed of dense irregular connective tissue that provides mechanical strength and houses blood vessels, hair follicles, and sensory receptors?

   • A) Stratum corneum
   • B) Hypodermis
   • C) Dermis
   • D) Stratum basale