#1
Which layer of the skin contains blood vessels, nerves, and glands?
Dermis
ExplanationSite of vascularization, innervation, and glandular structures.
#2
What is the primary function of sebaceous glands?
To produce oil
ExplanationProduces sebum, an oily substance to lubricate and waterproof the skin.
#3
What is the medical term for sweat glands?
Sudoriferous glands
ExplanationSweat glands responsible for thermoregulation.
#4
What is the primary function of hair follicles?
To anchor hair in the skin
ExplanationAnchors hair shaft and aids in its growth and regeneration.
#5
What is the primary function of the arrector pili muscles?
To cause hair erection
ExplanationContracts to raise hair shafts, producing 'goosebumps'.
#6
Which layer of the epidermis is primarily composed of dead cells filled with keratin?
Stratum corneum
ExplanationOutermost layer of epidermis, providing waterproofing and protection.
#7
Which of the following is NOT a function of the skin?
Synthesis of vitamin C
ExplanationSkin does not synthesize vitamin C; it's obtained through diet.
#8
Which cells in the epidermis are responsible for producing melanin?
Melanocytes
ExplanationMelanocytes synthesize melanin, providing skin color and UV protection.
#9
Which layer of the epidermis is responsible for constant cell division and renewal?
Stratum basale
ExplanationBasal layer constantly renews epidermal cells through mitosis.
#10
Which protein gives skin its flexibility and strength?
Elastin
ExplanationElastin provides skin elasticity and resilience.
#11
Which skin layer contains adipose tissue?
Hypodermis
ExplanationLayer of skin primarily composed of adipocytes, providing insulation and energy storage.
#12
What is the primary function of melanin in the skin?
To protect against UV radiation
ExplanationPigment absorbs UV radiation, preventing DNA damage.
#13
Which skin condition is characterized by inflammation of the sebaceous glands?
Acne
ExplanationInflammatory skin condition affecting the sebaceous glands.
#14
What is the primary function of the hypodermis layer?
To anchor the skin to underlying structures
ExplanationAttaches skin to underlying tissues and provides insulation.
#15
Which of the following is NOT a function of melanocytes?
Regulation of body temperature
ExplanationMelanocytes produce melanin, not involved in thermoregulation.