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46 Cards in this Set
- Front
- Back
What are the three layers of the skin?
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epidermis, dermis, subcutaneous
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What are the appendages of the skin?
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-sweat glands
-sebaceous glands -hair follicles -nails |
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Is the epidermis vascular or avascular?
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avascular
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Where does the epidermis get its nutrition?
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the dermis
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What are the two major areas of the epidermis?
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1. stratum germinatum-melanocytes and keratinocytes
2. stratum corneum-dead squamous cells containing keratin |
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What is the structure of the dermis?
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vascular, connective tissue that supports the epidermis
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What two things does the dermis contain?
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1. sensory nerve fibers that transmit pain, touch and temp
2. autonomic motor nerves |
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What is the structure of the subcutaneous tissue?
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loose connective tissue and adipose cells
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What isi the function of the subcutaneous tissue?
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insulation, shock absorption, calorie reserve
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What are the 6 functions of the skin?
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1. protects against microbes and minor trauma
2. slows fluid loss 3. excretes sweat, urea, lactic acid 4. provides sensory perception 5. helps regulate body temp 6. helps regulate blood pressure |
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What six changes occur to the skin as a person ages?
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1. sebaceous and sweat gland activity decreases
2. epidermis thins and flattens 3.dermis vascularity and elasticity decreases *wrinkling 4. subcutaneous tissue lost 5. nails thicker, brittle, yellow, prone to splitting due to slow growth 6. hair turns gray |
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What is vitiligo?
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absence of melanin pigment in patchy areas of white or light skin on parts of the body
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What is the mnemonic for abnormal characteristics of pigmented lesions?
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A-asymmetry
B-border C-color variation D-diameter E-elevation or enlargement |
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What are some collor changes that occur over the entire body?
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pallor (white)
erythema (red) cyanosis (blue) jaundice (yellow) |
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What is pallor associated with?
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acute high stress states, cold, cigarette smoking, presence of edema, anemia, schock, arterial insufficiency
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What is erythema expected with?
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fever, local inflammation, emotional reactions, polycythemia, venous stasis, carbon monoxide poisoning, extravascular presence of red blood cells
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When might a person be cyanotic?
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hypoxemia that occurs with schokc, heart failure, chronic bronchitis, congenital heart disease, anemia
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What does jaundice indicate?
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rising amounts of bilirubin in the blood
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What might jaundice occur with?
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hepatitis, cirrhosis, sickle cell disease, transfusion reaction, hemolytic disease of the newborn
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What is the difference between a primary and secondary lesion?
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primary-lesion develops on previous unaltered skin
secondary-when a lesion changes over time or because of scratching or infection |
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What characteristics are important to observe in lesions?
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1. color
2. elevation: flat, raised, pedunculated 3. pattern or shape: pattern may be characteristic of certain disease 4. size-in centimeters 5. location and distribution 6. any exudate;color and odor |
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What hair changes accompany tinea capitiis?
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gray, scaly, well defined areas with broken hairs
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What occurs with hirsutism?
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excess body hair
-with females, indicates endocrine abnormalities |
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Describe a macule and give an example.
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color change, flat, circumscribed, less than 1 cm. example is a freckle
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Describe a patch and give an example.
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same as a macule; color change, flat, circumscribed but greater than 1 cm
example is vitiligo |
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Describe a papule and give an example.
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something you can feel (solid, elevated, circumscribed, less than 1 cm diameter) that is caused by superficial thickening of the epidermis
example is a mole or wart |
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Describe a plaque and give an example.
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papules coalesce to form surface elevation wider than 1 cm. plateau like, disk shaped lesion.
example is psoriasis |
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Describe a nodule and give an example.
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a nodule is solid, elevated, hard or soft, larger than 1 cm. extends deeper into the dermis than a papule.
example: fibroma |
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Describe a tumor and give an example.
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larger than a few cm, firm or soft, deeper into dermis, benign or malignant
example: lipoma |
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Describe a wheal and give an example.
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superficial, raised, transient, erythematous, irregular shape due to edema
example: mosquito bite |
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Describe urticaria
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wheals that join to form an extensive reaction; highly pruritic
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Describe a vesicle and give an example.
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elevated cavity containing free fluid, up to 1 cm, blister
example: herpes simplex |
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Describe a bulla and give an example.
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larger than 1 cm diameter, superficial in epidermis, ruptures easily
example: burn |
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Describe a cyst and give an example
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encapsulated fluid filled cavity in dermis or subcutaneous layer
example: sebaceous cyst |
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Describe a pustule and give an example.
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turbid fluid in the cavity, circumscribed and elevated
example: acne |
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Describe a crust and give an example.
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dried exudate when vesicles or pustules burst. example scab or impetigo
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Describe a scale and give an example.
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raised piling of keratinized cells
example: eczema, dry skin |
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Describe a fissure and give an example.
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linear split through epidermis to dermis
example: athletes foot |
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Describe erosion and give an example.
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depressed, moist, superficial, heals without scar
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Describe an ulcer and give an example.
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an ulcer is a deeper depression extending into the dermis, irregular shape, may bleed, leaves scar when heals
example: pressure ulcer |
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Describe excoriation and give an example
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self inflicted abrasion, superficial, scratches from intense itching
example: abrasion or scratch |
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Whatis a scar and give an example
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normal tissue is lost and replaced with connective tissue
example: healed area of surgery |
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Describe lichenification and give an example
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prolonged, intense scratching that eventually thickens skin and produces tightly packed set of papules; looks like moss
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Describe an atrophic scar and give an example.
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skin level is depressed with loss of tissue, thinning of epidermis.
example: striae |
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What is a hypertrophic scar that is raised beyond the borders of a wound?
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keloid
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What are the four stages of a pressure ulcer?
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stage 1: intact skin is red but unbroken
stage 2:partial thickness skin erosion with loss of epidermis/dermis stage 3: full thickness pressure ulcer that extends to subcutaneous tissue; resembles a crater stage 4:full thickness pressure ulcer involving all skin layers and extends into supporting tissue. |