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Exercise 7: The Integumentary System

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created 3 years ago by jncanf

pg. 101 - pg. 104

updated 3 years ago by jncanf

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  • 1
    The two basic tissues of which the skin is composed are dense connective tissue, which makes up the dermis, and __1__, which forms the epidermis.
    Most cells of the epidermis are __2__. The protein __3__ makes the dermis tough and leather like. The specialized cells that produce the pigments that
    contribute to skin color are called __4__.
    1. stratified squamous epithelium
    2. Keratinocytes
    3. Keratin
    4. Melanocytes
  • 2
    Four protective functions of the skin are?
    1. prevents desiccation
    2. prevents bacterial invasion
    3. protects against thermal damage
    4. protects against UV radiation.
  • 3
    translucent cells in thick skin containing keratin fibrils
    stratum lucidum
  • 4
    dead cells
    stratum corneum and stratum lucidum
  • 5
    dermal layer responsible for finger prints
    papilliary layer
  • 6
    vascular region
    dermis as a whole
  • 7
    major skin area that produces derivatives(nails and hair)
    epidermis as a whole
  • 8
    epidermal area exhibiting the most rapid cell division
    stratum basale
  • 9
    scalelike dead cells, full of keratin, constantly slough off
    stratum corneum
  • 10
    mitotic cells filled with intermediate filaments
    stratum spinosum
  • 11
    has abundant elastic and collagenic fibers
    dermis as a whole
  • 12
    location of melanocytes and tactile (merkle) cells
    stratum basale
  • 13
    area where weblike pre-keratin filaments first appear
    stratum spinosum
  • 14
    region of areolar connective tissue
    papillary layer
  • 15
  • 16
    _____________ granules extruded from the keratinocytes prevent water loss by diffusion through the epidermis
  • 17
    fibers in the dermis are produced by ______________.
  • 18
    glands that respond to rising androgen levels are the ____________________ glands.
    sebaceous and apocrine glands
  • 19
    phagocytic cells that occupy the epidermis are called _____________________________.
    epidermal dendritic or langerhans cells
  • 20
    a unique touch receptor formed from a stratum basale cell and a nerve fiber is a __________________.
    tactile or Merkel disc
  • 21
    What layer is present in the thick skin but not in thin skin?
    stratum lucidum
  • 22
    What cell-to-cell structure holds the cells of the stratum spinosum tightly together?
  • 23
    What substance is manufactured in the skin that plays a role in calcium absorption elsewhere in the body?
    vitamin D3
  • 24
    List the sensory receptors found in the dermis of the skin:
    free nerve endings for pain, temperature, messiners corpuscles for touch in the hairless skin, pacinian corpuscles for pressure
  • 25
    A nurse tells a doctor that a patient is cyanotic. Define cyanotic.
    A blue cast to the skin
  • 26
    What does cyanotic presence imply?
    Inadequate oxygenation of the blood
  • 27
    What is a bedsore (decubitus ulcer)?
    localized area of tissue necrosis and death
  • 28
    Why do ulcers occur?
    pressure areas point of increased pressure over bony areas restrict the blood supply to the area
  • 29
    Produces an accumulation of oily material that is known as a blackhead
    sebaceous glands
  • 30
    Tiny muscles, attached to hair folicles, that pull the hair upright during fright or cold
    arrector pili
  • 31
    Perspiration glands with a role in temperature control
    sweat gland---eccrine
  • 32
    Sheath formed of both epithelial and connective tissues
    hair follicle
  • 33
    Less numerous type of perspiration-prouducing gland; found mainly in the pubic and axillary regions
    sweat gland--apocrine
  • 34
    Found everywhere on the body except the palms of hands and soles of the feet
    sebaceous glands
  • 35
    Primarily dead/keratinized cells
    nail and hair
  • 36
    Specialized nerve ending that respond to temperature, touch, etc.
    cutaneous receptors
  • 37
    Secretes a lubricant for hair and skin
    sebaceous glands
  • 38
    "sports" a lunule and cuticle
  • 39
    Describe two integumentary system mechanisms that help in regulating body temperature:
    1. When capillary blood dlow to the skin and enhanced by nervous system controls, heat radiates from the skin surface; restriction of blood flow conserves body heat.
    2. Activity of sweat glands i.e., when perspiration evaporates from the skin surface, heat is lost.
  • 40
  • 41
    With what substance in the bond paper does the iodine painted on the skin react?
    The starch
  • 42
    Based on class data, which skin area--the forearm or palm of hand--has more sweat glands?
  • 43
    Which other body areas would if tested prove to have a high density of sweat glands?
    Face and Axillae
  • 44
    What organ system controls the activity of the eccrine sweat glands?
    Nervous system
  • 45
    Why can fignerprints be used to identify individuals?
    The pattern of your epidermal ridges is unique and does not change during your lifetime. Everyones fingerprint was made different, therefore this is a useful way for people to identify one another.
  • 46
    Name the three common fingerprint patterns:
    Loops, Arches and Whorls