the integumentary system
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Questions and Answers

Which layer of the epidermis is avascular and impermeable to water?

  • Stratum granulosum
  • Stratum basale
  • Stratum spinosum
  • Stratum corneum (correct)
  • What is the primary function of Langerhans cells in the epidermis?

  • Produce melanin
  • Promote skin hydration
  • Produce keratin
  • Act as immune cells (correct)
  • Which type of cells in the epidermis are responsible for synthesizing the protein keratin?

  • Langerhans cells
  • Merkel cells
  • Keratinocytes (correct)
  • Melanocytes
  • Where is the stratum lucidum found in the epidermis?

    <p>Fingertips and palms</p> Signup and view all the answers

    Which layer of the epidermis contains melanocytes?

    <p><em>Stratum basale</em></p> Signup and view all the answers

    What is the primary function of Merkel cells in the epidermis?

    <p><em>Sensory perception</em></p> Signup and view all the answers

    Keratinization is a process where keratinocytes produce keratin. Which layer of the epidermis is primarily involved in this process?

    <p><em>Stratum granulosum</em></p> Signup and view all the answers

    What is the function of Langerhans cells in the epidermis?

    <p>Signal the immune system of an infection</p> Signup and view all the answers

    Which cells produce melanin in the skin?

    <p>Melanocytes</p> Signup and view all the answers

    What is the primary role of Merkel cells in the epidermis?

    <p>Act as touch receptors</p> Signup and view all the answers

    Which layer of the epidermis contains rapidly dividing cells?

    <p>Stratum basale</p> Signup and view all the answers

    What is the process by which living epidermal cells transform into flattened dead cells of the stratum corneum?

    <p>Keratinization</p> Signup and view all the answers

    Which layer of the epidermis contains diamond-shaped cells called granular cells?

    <p>Stratum granulosum</p> Signup and view all the answers

    "Guard" cells that patrol the epidermis and are sensitive to sun exposure are known as:

    <p>&quot;Langerhans&quot; cells</p> Signup and view all the answers

    What is the main difference between the epidermis and the dermis?

    <p>The epidermis wears away, unlike the dermis.</p> Signup and view all the answers

    Which layer of the dermis contains glycosaminoglycans (GAGs)?

    <p>Papillary dermis</p> Signup and view all the answers

    What are rete pegs responsible for in the skin?

    <p>Binding the epidermis and dermis together</p> Signup and view all the answers

    What is the main function of blood vessels in the dermis?

    <p>Transporting oxygen and nutrients to the skin</p> Signup and view all the answers

    Which component is NOT found in the dermis?

    <p>Melanocytes</p> Signup and view all the answers

    What is the role of glycosaminoglycans (GAGs) in the skin?

    <p>Regulating moisture and appearance of skin surface</p> Signup and view all the answers

    Which structures create fingerprints on our skin?

    <p>Epidermal ridges</p> Signup and view all the answers

    Which skin component secretes sebum to lubricate the skin and hair?

    <p>Sebaceous glands</p> Signup and view all the answers

    What is the function of sweat glands located over the whole surface of the skin?

    <p>Regulate body temperature by evaporating from the skin surface</p> Signup and view all the answers

    Where are sebaceous glands found in the skin?

    <p>In the hair follicles to lubricate the skin and hair</p> Signup and view all the answers

    Which type of gland produces wax to protect the ear by trapping small particles?

    <p>Wax glands</p> Signup and view all the answers

    How many sweat glands are present in an average human body?

    <p>~ 2-5 million, abundant on palms and soles</p> Signup and view all the answers

    Which skin component is responsible for transmitting sensations such as touch, pain, and heat intensity to the brain?

    <p>Sensory receptors</p> Signup and view all the answers

    What is the primary function of Lymphatic ducts in skin tissue?

    <p>Fight microbes with white blood cells of the immune system in lymph</p> Signup and view all the answers

    Which component of the skin plays a key role in regulating body temperature by transporting water to the skin's surface for evaporation?

    <p>Sweat glands</p> Signup and view all the answers

    Where do sensory receptors transmit sensations like touch, pain, and heat intensity?

    <p>To the brain</p> Signup and view all the answers

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