Histology & Embryology of Skin Quiz
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Questions and Answers

Which of the following is NOT a function of the skin?

  • Absorption of some lipid soluble material
  • Excretion of excess water (correct)
  • Regulation of body temperature
  • Protection against injury

    • What is the approximate weight of the integument (skin and its appendages) in a person weighing 70 kg?

  • 3 kg
  • 4 kg (correct)
  • 2 kg
  • 1 kg

    • In terms of thickness, the skin generally ranges between:

  • 3 - 5 mm (correct)
  • 0.1 - 0.5 mm
  • 1 - 2 mm
  • 2 - 3 mm

    • Which of the following is responsible for the regulation of body temperature?

    <p>Blood vessels and glands of the dermis</p> Signup and view all the answers

    The skin is continuous with the mucous membranes of which of the following systems?

    <p>Gastrointestinal and respiratory systems</p> Signup and view all the answers

    Which of the following is NOT a component of the integument?

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

    What is the main function of sebaceous glands in the skin?

    <p>Producing oil for lubrication and protection</p> Signup and view all the answers

    What is the primary function of sweat glands in the skin?

    <p>Regulating body temperature</p> Signup and view all the answers

    The color of the skin depends on:

    <p>Vascularization and pigmentation</p> Signup and view all the answers

    What is the main function of nails in the integumentary system?

    <p>Protection of fingertips and toes</p> Signup and view all the answers

    What is the approximate surface area of the skin in a person weighing 70 kg?

    <p>4.5 m²</p> Signup and view all the answers

    What is excreted from the sweat glands in addition to sweat?

    <p>Ions such as Na, K, and Cl</p> Signup and view all the answers

    Which layer of the skin is primarily composed of irregular dense connective tissue?

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

    Which type of sweat glands are found only in specific areas such as axilla and anal region?

    <p>Apocrine sweat glands</p> Signup and view all the answers

    What is the primary function of arrector pili muscles?

    <p>Erection of hair follicles</p> Signup and view all the answers

    Which skin layer is present only in thick skin that covers the palms and soles?

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

    What is the primary function of sebaceous glands?

    <p>Production of oil for skin and hair</p> Signup and view all the answers

    In which layer of the epidermis do cells still have nuclei?

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

    Where are apocrine sweat glands primarily found?

    <p>Axilla and anal region</p> Signup and view all the answers

    Which layer of the skin is known for its function as a water barrier to prevent water loss?

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

    Where are eccrine sweat glands found throughout the body except for specific areas?

    <p>Palms and soles</p> Signup and view all the answers

    Which layer of the skin primarily consists of loose connective tissue containing varying amounts of fat?

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

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

    <p>Antigen presentation among keratinocytes</p> Signup and view all the answers

    What is the approximate weight of the integument (skin and its appendages) in a person weighing 70 kg?

    <p>5 kg</p> Signup and view all the answers

    In which layer of the skin are the sebaceous, eccrine, and apocrine sweat glands located?

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

    Which of the following functions is NOT associated with the skin?

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

    What is the primary function of arrector pili muscles in the integumentary system?

    <p>Raising hair follicles</p> Signup and view all the answers

    At which body regions are apocrine sweat glands primarily found?

    <p>Axilla and anal region</p> Signup and view all the answers

    What is excreted from the sweat glands in addition to sweat?

    <p>Water and electrolytes</p> Signup and view all the answers

    What is the primary function of nails in the integumentary system?

    <p>Protection of fingertips</p> Signup and view all the answers

    Which skin layer is responsible for preventing water loss and acting as a barrier?

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

    What is the approximate surface area of the skin in a person weighing 70 kg?

    <p>2.5 m²</p> Signup and view all the answers

    Where are eccrine sweat glands found throughout the body except for specific areas?

    <p>Palms and soles</p> Signup and view all the answers

    What is the main function of Merkel cells in the skin?

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

    Which layer of the epidermis is known for its function as a water barrier to prevent water loss?

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

    Where are apocrine sweat glands primarily found?

    <p>Axilla, areola of the nipple, and anal region</p> Signup and view all the answers

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

    <p>Antigen presenting dendritic cells</p> Signup and view all the answers

    In terms of thickness, how does thick skin differ from thin skin?

    <p>Thick skin lacks hair follicles</p> Signup and view all the answers

    What is the primary function of sebaceous glands in the skin?

    <p>Produce sebum for skin texture and hair flexibility</p> Signup and view all the answers

    What is excreted from the sweat glands in addition to sweat?

    <p>Odorless viscous product gaining distinctive odor after being metabolized by bacteria</p> Signup and view all the answers

    Which of the following is NOT a component of the integument?

    <p>Blood vessels</p> Signup and view all the answers

    What is the primary function of sweat glands in the skin?

    <p>Control body temperature through sweat excretion</p> Signup and view all the answers

    The color of the skin depends on:

    <p>Melanin synthesized by melanocytes</p> Signup and view all the answers

    Study Notes

    Skin Functions and Components

    • Key functions of skin include protection, temperature regulation, sensation, and excretion.
    • Components of the integument include skin, hair, nails, and glands, with sebaceous and sweat glands being vital.
    • NOT a function of skin: blood production.

    Skin Weight and Surface Area

    • In a person weighing 70 kg, the approximate weight of the integument (skin and appendages) is about 4-5 kg.
    • The skin's approximate surface area for a 70 kg individual is around 1.8 square meters.

    Skin Thickness

    • Skin thickness generally ranges between 1-4 mm, with thick skin (palms, soles) being significantly thicker than thin skin.

    Temperature Regulation

    • The skin assists in body temperature regulation through sweat production and the dilation of blood vessels.

    Connection to Mucous Membrane

    • Skin is continuous with the mucous membranes of the digestive, respiratory, and urogenital systems.

    Sebaceous and Sweat Glands

    • Primary function of sebaceous glands is to produce sebum, which lubricates and waterproofs the skin.
    • Sweat glands primarily serve to regulate body temperature through perspiration and excrete waste like urea, salts, and water.

    Skin Coloration

    • Skin color is determined by melanin production, blood flow, and the thickness of the stratum corneum.

    Nails and Integumentary System

    • The primary function of nails is to protect distal phalanx and enhance fine motor movements.

    Sweat Gland Types and Locations

    • Eccrine sweat glands are found widely across the body; apocrine glands are located in specific areas like axillae and the anal region.
    • Apocrine sweat glands are primarily found in areas such as the armpits and groin.

    Skin Layers and Functions

    • Dermis is primarily composed of irregular dense connective tissue; the epidermis consists of several layers, where cells have varying states of nuclei presence and functionality.
    • The layer responsible for forming a barrier and preventing water loss is the stratum corneum.

    Special Cell Functions

    • Langerhans cells in the epidermis function as immune responders.
    • Merkel cells are involved in the sensation of touch.

    Arrector Pili Muscles

    • Primary function of arrector pili muscles is to cause hair follicles to stand upright ("goosebumps") and assist in thermoregulation.

    Distinction of Skin Types

    • Thick skin includes a unique layer known as the stratum lucidum, absent in thin skin.

    Excretion from Sweat Glands

    • In addition to sweat, glands also excrete salts, urea, and other metabolic waste products.

    Summary of Notable Points

    • NOT a component of the integument: connective tissues (like bone).
    • Thick skin differs from thin skin in terms of added layers and thickness.

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    Related Documents

    Skin Anatomy PDF

    Description

    Test your knowledge on the layers and cells of the epidermis, histological structure of the dermis, histophysiology of the skin, skin appendages, and the structural components of sebaceous, eccrine and apocrine sweat glands, hairs, hair follicles, and nails.

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