Integumentary system anatomy
a genetic switch turns on graying hair in response to
age
sunburn with red blisters and swollen skin and painful. what feature of this burn distinguishes it from a first degree burn
blisters
People whose melanocytes produce a lot of melanin have a skin tone that is _______
brown
what protein provides toughness to the dermis and holds water in this skin layer
collagen fibers
what function do the arrestor pill muscles serve?
connect each side of the hair follicle to dermal tissue
the outermost layer of the epidermis is keratinized and known as stratum
corneum
nutrients reach the surface of the skin through the process of
diffusion
a little girl on the playground fell and scraped her knee. there is no bleeding so this must be only a superficial scrape to the
epidermis
the sebaceous and sweat glands associated with the skin are classified as ___ glands because they release secretions on to the skin's surface via ducts
exocrine
Joe just burned himself on a hot pot. A blister forms and the burn is painful. Joe's burn would best be described as a third-degree burn.
false
nails and hair are both composed of living cells
false
sebaceous glands and apocrine glands are both types of sweat glands
false
the ABCDE rule is used to assess the characteristics of moles and areas of differing skin pigmentation
false
the reason that the nail bed appears pink the presence of a large number of melanocytes in the underlying dermis
false
what type of burn only involves injury to the epidermis
first degree
the skin and its appendages (nails, glands and hairs) are collectively called the
integumentary system
which of the following is secreted into the surface of the skin that keeps it soft and moist and also contains chemicals that kill bacteria
sebum
What skin disorder is recognized using the ABCDE rule?
skin cancer
which of these layers directly connects to the dermis
stratum germinativum
which of the following letters in the ABCDE rule for recognizing melanomas is INCORRECT?
D stands for diagnosis
Which vitamin is synthesized by the skin?
Vitamin D
which of the following abnormal skin colors russets from liver disorders
jaundice
the white crescent area located over the nail matrix is called the
lunula
Your 70-year-old grandfather shows signs of loss of hair and some baldness. What age-related disorder do you suspect is the cause?
male pattern baldness
Hair color is due to a pigment known as ________.
melanin
the "tanning" effect that occurs when a person is exposed to the sun increasing production of
melanin
which of the following are pigments that contribute to skin color
melanin, carotene, hemoglobin
fingerprints and footprints in the epidermis are created by dermal papillae present in the
papillary layer of the dermis
a physician estimates the present coverage of a burn using
the rule of nines
which of the following is a vital function of the integumentary system?
the skin synthesizes vitamin D
When an individual is exposed to extremely low air temperatures, the dermal blood vessels will dilate so that blood and heat will be dissipated.
true
aprocrine gland secretions are normally odorless and may be yellowish in color
true
eccrine glands are most numerous type of sweat glands covering most areas of the body
true
the arrestor pili muscle contracts and pulls hairs upright when we are cold or frightened
true
the pigments that contribute to skin color are melanin carotene and hemoglobin
true
the rule of nines is used to estimate how much of the body surface is burned (% coverage)
true
