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Integumentary System - Anatomy & Physiology

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  • What are the main functions of the integumentary system?

    The integumentary system protects the body, regulates temperature, prevents water loss, and provides sensory information.

  • What are the three primary layers of the skin?

    The epidermis, dermis, and hypodermis (subcutaneous layer).

  • What type of tissue primarily composes the epidermis?

    Stratified squamous epithelial tissue.

  • What is the role of keratinocytes in the epidermis?

    Keratinocytes produce keratin, a protein that strengthens and waterproofs the skin.

  • Which layer of the skin contains blood vessels and nerves?

    The dermis contains blood vessels, nerves, hair follicles, and glands.

  • What is the function of melanocytes?

    Melanocytes produce melanin, the pigment responsible for skin color and protection against UV radiation.

  • What is the hypodermis composed of and what is its function?

    The hypodermis is composed mainly of adipose tissue and provides insulation and cushioning.

  • Name two types of glands found in the integumentary system.

    Sweat glands (eccrine and apocrine) and sebaceous (oil) glands.

  • What is the primary function of sweat glands?

    To produce sweat for thermoregulation and excretion of waste.

  • What role do sebaceous glands play in skin health?

    They secrete sebum, an oily substance that lubricates and waterproofs the skin and hair.

  • What is the significance of the stratum corneum?

    The stratum corneum is the outermost epidermal layer, providing a tough, protective barrier of dead keratinized cells.

  • How does the integumentary system contribute to sensory perception?

    It contains sensory receptors that detect touch, pressure, pain, and temperature.

  • What is the function of hair in the integumentary system?

    Hair provides protection, sensory input, and helps regulate body temperature.

  • What is the role of the arrector pili muscle?

    It contracts to cause hair to stand up, producing 'goosebumps' and aiding in heat retention.

  • How does the skin help regulate body temperature?

    Through sweat production and blood vessel dilation or constriction in the dermis.

  • What is the process of keratinization?

    Keratinization is the formation of a layer of dead, protective cells filled with keratin in the epidermis.

  • Which cells in the epidermis are involved in immune defense?

    Langerhans cells help detect and fight pathogens entering through the skin.

  • What pigment determines skin color and how is it produced?

    Melanin, produced by melanocytes, determines skin color and protects against UV damage.

  • What is the role of the basement membrane in the skin?

    It anchors the epidermis to the dermis and acts as a barrier and filter.

  • How does the integumentary system assist in vitamin D synthesis?

    UV radiation converts a precursor in the skin to vitamin D, essential for calcium absorption.