The skin

  1. Which of the following is the outermost layer of the skin?
    A) Dermis
    B) Epidermis
    C) Hypodermis
    D) Subcutaneous tissue

Answer: B) Epidermis

  1. Which layer of the epidermis is responsible for cell division and melanin production?
    A) Stratum corneum
    B) Stratum lucidum
    C) Stratum basale
    D) Stratum granulosum

Answer: C) Stratum basale

  1. Which epidermal cells are responsible for immune defense?
    A) Keratinocytes
    B) Melanocytes
    C) Merkel cells
    D) Langerhans cells

Answer: D) Langerhans cells

  1. What is the main function of the hypodermis?
    A) Sensory reception
    B) Protection against UV radiation
    C) Insulation and energy storage
    D) Waterproofing

Answer: C) Insulation and energy storage

  1. Which layer of the dermis contains dermal papillae that enhance grip and house capillaries?
    A) Reticular layer
    B) Papillary layer
    C) Hypodermis
    D) Epidermis

Answer: B) Papillary layer

  1. Which gland is responsible for thermoregulation?
    A) Sebaceous gland
    B) Apocrine gland
    C) Eccrine gland
    D) Ceruminous gland

Answer: C) Eccrine gland

  1. What is the primary function of melanocytes?
    A) Detect sensory stimuli
    B) Produce keratin
    C) Produce melanin to protect against UV radiation
    D) Aid in wound healing

Answer: C) Produce melanin to protect against UV radiation

  1. Which structure in the skin is responsible for detecting pressure and vibration?
    A) Merkel cells
    B) Pacinian corpuscles
    C) Free nerve endings
    D) Langerhans cells

Answer: B) Pacinian corpuscles

  1. What is the main structural protein found in the epidermis?
    A) Elastin
    B) Collagen
    C) Keratin
    D) Myosin

Answer: C) Keratin

  1. Which of the following is NOT a function of the skin?
    A) Excretion of waste products
    B) Vitamin C synthesis
    C) Sensory reception
    D) Thermoregulation

Answer: B) Vitamin C synthesis

  1. What is the role of sebaceous glands?
    A) Produce sweat for cooling
    B) Secrete sebum to moisturize the skin and hair
    C) Detect temperature changes
    D) Provide immune defense

Answer: B) Secrete sebum to moisturize the skin and hair

  1. Which skin adaptation results from repeated friction?
    A) Increased melanin production
    B) Callus formation
    C) Reduced keratinization
    D) Decreased collagen production

Answer: B) Callus formation

  1. Which type of sweat gland becomes active during emotional stress?
    A) Eccrine gland
    B) Apocrine gland
    C) Sebaceous gland
    D) Ceruminous gland

Answer: B) Apocrine gland

  1. What triggers the synthesis of vitamin D in the skin?
    A) Blood circulation
    B) UV radiation
    C) Sweat production
    D) Sebum secretion

Answer: B) UV radiation

  1. What is the main function of the stratum corneum?
    A) Cell division
    B) Sensory detection
    C) Formation of a protective barrier
    D) Blood supply to the epidermis

Answer: C) Formation of a protective barrier