The Integumentary System
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The Integumentary System

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Questions and Answers

Which one of the following is NOT an organ of the integumentary system?

  • Lungs (correct)
  • Scales
  • Feathers
  • Hair

    • What is the main function of the integumentary system?

  • To pump oxygen to the body
  • To regulate body temperature (correct)
  • To produce blood cells
  • To aid in digestion

    • Which layer of the skin provides the initial barrier to the external environment?

  • Dermis
  • Hypodermis
  • Epidermis (correct)
  • Subcutaneous layer

    • What is the approximate percentage of total body weight that the skin accounts for in humans?

    <p>12-15%</p> Signup and view all the answers

    Which layer of the skin contains connective tissues, vessels, glands, and hair roots?

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

    What gives color to the skin?

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

    Which one of the following is NOT a function of the integumentary system?

    <p>Delivering oxygen to cells</p> Signup and view all the answers

    What is the attachment site for sensory receptors in the integumentary system?

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

    What is the transitional subcutaneous zone made up of?

    <p>Loose connective and adipose tissue</p> Signup and view all the answers

    What is the basement membrane that separates the epidermis from the dermis made up of?

    <p>Basal lamina and reticular lamina</p> Signup and view all the answers

    Which layer of the skin is responsible for the formation of the epidermal water barrier?

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

    What is the main function of the epidermis?

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

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

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

    What is the function of the hypodermis?

    <p>Energy storage</p> Signup and view all the answers

    Which layer of the skin is responsible for the production of keratin?

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

    What is the composition of the epidermis?

    <p>Stratified squamous epithelial cells</p> Signup and view all the answers

    Which layer of the skin is highly vascularized and consists of loose connective tissue?

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

    What is the function of the dermis?

    <p>Supporting the epidermis</p> Signup and view all the answers

    Which layer of the skin is responsible for the flexibility and elasticity of the integument?

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

    What is the function of the hypodermis in thermoregulation?

    <p>Heat insulation</p> Signup and view all the answers

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

    <p>Protect against invasion by infectious organisms</p> Signup and view all the answers

    What is the role of the skin in gas exchange for small-bodied invertebrates in aquatic or moist habitats?

    <p>It allows gases to diffuse into and out of the interstitial fluid</p> Signup and view all the answers

    What is the main purpose of the skin's integumentary exchange system?

    <p>To allow gases to diffuse into and out of the interstitial fluid</p> Signup and view all the answers

    How does the skin protect the body against sunburns?

    <p>By secreting melanin</p> Signup and view all the answers

    What is the role of the skin as a receptor?

    <p>To sense touch, pressure, pain, heat, and cold</p> Signup and view all the answers

    What are some possible diseases and injuries to the human integumentary system?

    <p>Formation of new cells to repair minor injuries</p> Signup and view all the answers

    What does the skin do to help maintain homeostasis?

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

    What is the function of the skin's stratum germinativum?

    <p>To form new cells to repair minor injuries</p> Signup and view all the answers

    What is the role of the skin in excreting waste materials?

    <p>To excrete waste materials through perspiration</p> Signup and view all the answers

    What does the skin do in response to abrupt changes in temperature?

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

    Which one of the following is NOT an appendage of the integumentary system?

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

    What is the main function of the hypodermis?

    <p>Providing thermal insulation</p> Signup and view all the answers

    Which layer of the skin contains nerve endings?

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

    What is the approximate surface area covered by the skin in humans?

    <p>1 to 1.5 m2</p> Signup and view all the answers

    What is the composition of the basement membrane?

    <p>Basal lamina and reticular lamina</p> Signup and view all the answers

    Which layer of the skin is responsible for the flexibility and elasticity of the integument?

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

    What is the role of the skin in maintaining water balance?

    <p>Preventing water loss</p> Signup and view all the answers

    Which layer of the skin is highly vascularized?

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

    What is the role of the skin as an attachment site for sensory receptors?

    <p>Detecting pain</p> Signup and view all the answers

    What is the main function of the epidermis?

    <p>Maintaining water balance</p> Signup and view all the answers

    Which layer of the skin is responsible for the production of lipids that form the epidermal water barrier?

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

    What is the function of the stratum lucidum in the epidermis?

    <p>To provide extra protection in thicker areas of the skin</p> Signup and view all the answers

    What is the role of the dermis in the integumentary system?

    <p>To support the epidermis</p> Signup and view all the answers

    Which layer of the skin provides elasticity and flexibility to the integument?

    <p>Reticular layer of the dermis</p> Signup and view all the answers

    What is the main function of the hypodermis?

    <p>To store fats and act as an energy reserve</p> Signup and view all the answers

    What is the primary role of the epidermis in the integumentary system?

    <p>To provide protection against the outer environment</p> Signup and view all the answers

    Which layer of the skin is highly vascularized and consists of loose connective tissue?

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

    What is the function of the hypodermis in thermoregulation?

    <p>To act as a heat insulator</p> Signup and view all the answers

    What is the approximate percentage of total body weight that the skin accounts for in humans?

    <p>15%</p> Signup and view all the answers

    What gives color to the skin?

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

    What is the primary function of the skin's stratum germinativum?

    <p>To form new cells to repair minor injuries</p> Signup and view all the answers

    How does the skin protect the body against sunburns?

    <p>By secreting melanin</p> Signup and view all the answers

    What is the role of the skin as a receptor?

    <p>To act as a receptor for touch, pressure, pain, heat, and cold</p> Signup and view all the answers

    What is the function of the hypodermis in thermoregulation?

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

    What is the main purpose of the skin's integumentary exchange system?

    <p>To facilitate gas exchange</p> Signup and view all the answers

    What percentage of total body weight does the skin account for in humans?

    <p>Around 10%</p> Signup and view all the answers

    What are some possible diseases and injuries to the human integumentary system?

    <p>Skin cancer and burns</p> Signup and view all the answers

    What is the main function of the epidermis?

    <p>To protect against invasion by infectious organisms</p> Signup and view all the answers

    What is the function of the dermis?

    <p>To provide structural support and flexibility</p> Signup and view all the answers

    What is the transitional subcutaneous zone made up of?

    <p>Adipose tissue</p> Signup and view all the answers

    Which of the following is NOT a function of the integumentary system?

    <p>Coordination of immune response to pathogens and cancer cells</p> Signup and view all the answers

    What is the role of the skin in maintaining water balance?

    <p>Preventing excessive water loss</p> Signup and view all the answers

    What is the main function of the dermis?

    <p>Nourishment of epidermal cells</p> Signup and view all the answers

    Which layer of the skin is responsible for the production of lipids that form the epidermal water barrier?

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

    What is the approximate percentage of total body weight that the skin accounts for in humans?

    <p>15%</p> Signup and view all the answers

    What gives color to the skin?

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

    Which layer of the skin provides elasticity and flexibility to the integument?

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

    Which layer of the skin contains abundant adipocytes and serves as an energy reserve and shock absorber?

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

    Which body parts have a higher concentration of adipocytes in the hypodermis in men?

    <p>Upper neck and upper arms</p> Signup and view all the answers

    Which body parts have a higher concentration of adipocytes in the hypodermis in women?

    <p>Breast and hips</p> Signup and view all the answers

    Which layer of the epidermis is responsible for the production of keratin?

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

    Which cells in the epidermis are responsible for producing melanin?

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

    Which layer of the epidermis contains cells that release their contents by exocytosis, forming a water resistance layer?

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

    Which cells in the epidermis are responsible for detecting touch?

    <p>Merkel Cells</p> Signup and view all the answers

    Which layer of the skin nourishes and supports the epidermis?

    <p>Superficial papillary layer</p> Signup and view all the answers

    Which layer of the skin restricts the spread of pathogens and attaches the skin to deeper tissues?

    <p>Deeper reticular layer</p> Signup and view all the answers

    Which layer of the skin contains a lot of fat cells (adipocytes)?

    <p>Subcutaneous layer</p> Signup and view all the answers

    Which layer of the skin contains fibers in an interwoven meshwork of dense irregular connective tissue?

    <p>Deeper reticular layer</p> Signup and view all the answers

    Which layer of the hair contains relatively soft and flexible keratin?

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

    What is the main function of hair follicles?

    <p>Produce hairs that protect the skull</p> Signup and view all the answers

    Which layer of the hair surrounds the hair root and the deeper portion of the shaft?

    <p>Internal root sheath</p> Signup and view all the answers

    What is the function of the arrector muscles in relation to hair?

    <p>They elevate the hair</p> Signup and view all the answers

    Which type of hair is heavy, deeply pigmented, and sometimes curly?

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

    What is the normal rate of hair growth on the scalp?

    <p>0.33 mm/d</p> Signup and view all the answers

    Which type of sweat glands are strongly influenced by hormones and have a possible function in communication?

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

    Which type of skin cancer is the least dangerous and is induced by UV rays of the sun?

    <p>Basal cell carcinoma</p> Signup and view all the answers

    What is the correct order of the layers of the skin, from outermost to innermost?

    <p>Epidermis, dermis, hypodermis</p> Signup and view all the answers

    What is the function of sebaceous glands in the skin?

    <p>Secrete oil lipid (sebum) that coats hair shaft and epidermis</p> Signup and view all the answers

    Which of the following is a function of hair follicles?

    <p>Produce hairs that protect the skull and provide touch sensations</p> Signup and view all the answers

    What is the composition of the medulla in most hairs?

    <p>Soft keratin</p> Signup and view all the answers

    What is the function of the cuticle in hair?

    <p>To coat and protect the outer surface of the hair</p> Signup and view all the answers

    Where is the hair papilla located?

    <p>At the base of the hair bulb</p> Signup and view all the answers

    What is the main component of the hair cortex?

    <p>Hard keratin</p> Signup and view all the answers

    What is the approximate percentage of hairs on the body that are not on the head?

    <p>98%</p> Signup and view all the answers

    What is the role of the hair matrix in hair production?

    <p>To produce daughter cells that form the developing hair</p> Signup and view all the answers

    What is the role of sebaceous glands in relation to hair?

    <p>To produce oil that lubricates and conditions the hair</p> Signup and view all the answers

    What is the function of sweat glands in relation to hair?

    <p>To produce sweat</p> Signup and view all the answers

    What is the function of nails in the integumentary system?

    <p>To protect the fingertips and enhance touch sensitivity</p> Signup and view all the answers

    Which type of sweat glands are limited in distribution and produce an odorous secretion?

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

    Which type of sweat glands are widespread and produce thin secretions mostly composed of water?

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

    Which type of sweat glands are specialized for milk production and are large, complex apocrine sweat glands?

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

    Which type of sweat glands secrete oil lipid (sebum) that coats the hair shaft and epidermis?

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

    Which type of glands secrete/produce waxy cerumen into the external ear canal?

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

    What is the most deadly type of skin cancer?

    <p>Malignant melanoma</p> Signup and view all the answers

    Which type of skin cancer is the least dangerous?

    <p>Basal cell carcinoma</p> Signup and view all the answers

    What is the main cause of skin cancer?

    <p>UV rays of the sun</p> Signup and view all the answers

    Which layer of the skin is responsible for the production of lipids that coat the hair shaft and epidermis?

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

    What is the term for the excessive growth of hair in women?

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

    What is the function of the hair root?

    <p>To attach the hair to the hair follicle</p> Signup and view all the answers

    Which layer of the hair does not extend the entire length of the follicle?

    <p>Internal root sheath</p> Signup and view all the answers

    What is the function of the external root sheath?

    <p>To extend from the skin surface to the hair matrix</p> Signup and view all the answers

    What is the function of the glassy membrane?

    <p>To act as a thickened basal lamina wrapped in dense connective tissue sheath</p> Signup and view all the answers

    What is the function of the arrector muscles?

    <p>To elevate the hair when stimulated</p> Signup and view all the answers

    What is the function of scalp hair?

    <p>To provide insulation for the skull</p> Signup and view all the answers

    What is the function of beard, pubic, and axillary hair?

    <p>To indicate sexual maturity and help distribute sexual scents</p> Signup and view all the answers

    What is the function of guard hairs/vibrissae and eyelashes?

    <p>To prevent foreign objects from getting into nostrils, ear canals, or eyes</p> Signup and view all the answers

    What is the function of hair in expressions of emotions with eyebrows?

    <p>To express emotions with eyebrows</p> Signup and view all the answers

    What are the three types of hairs?

    <p>Vellus, intermediate, terminal</p> Signup and view all the answers

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