Integumentary system anatomy

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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


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