Chapter 5 - The Integumentary System Notes Flashcards
Chapter 5 - The Integumentary System
the integumentary system consists of
skin
hair
nails
glands
Chapter 5 - The Integumentary System
function of skin
protects
helps regulate body temp
produces vitamin d
detects stimuli
Chapter 5 - The Integumentary System
skin is the
epidermis
Chapter 5 - The Integumentary System
thick skin has _ layers
5
Chapter 5 - The Integumentary System
where is thick skin found
palms of hands and soles of feet
Chapter 5 - The Integumentary System
thin skin has
4 layers
Chapter 5 - The Integumentary System
what is word for layer
stratum
Chapter 5 - The Integumentary System
what are the 5 layers of skin (basement to exterior)
germinativum
spinosum
lucidum
corneum
Chapter 5 - The Integumentary System
what is function of skin and membranes
protection of underlying tissue
excretion
regulation of normal body temp
synthesis of vit D in response to UV light
storage of nutrients
detection of touch, pressure, pain, and temp
Chapter 5 - The Integumentary System
_____ is the transformation of living cells of the stratum corneum to protective cell layers that contain keratin
keratinization
Chapter 5 - The Integumentary System
keratinized cells are filled with keratin and have a _______ both of which contribute to structural strenght
protein envelope
Chapter 5 - The Integumentary System
keratinized cells are alos held together by many
desmosomes
Chapter 5 - The Integumentary System
intercellular spaces (in keratinized cells) are filled with _______ that contribute to teh impermeability of teh epidermis to water
lipids
Chapter 5 - The Integumentary System
____ is found in skin and the inside of hair whereas _____ occurs in nails and the outside of hairs.
soft keratin
hard keratin
Chapter 5 - The Integumentary System
hard keratin makes cells
more durable
Chapter 5 - The Integumentary System
________ such as those on the palms and soles, improve our gripping ability and increase the skin’s sensitivity.
epidermal ridges
Chapter 5 - The Integumentary System
epidermal ridges interlock with the underlying _______
dermis
Chapter 5 - The Integumentary System
__________ are part of the immune system
langerhans cells
Chapter 5 - The Integumentary System
_______ provide inof about objects that touch the skin
merkel cells
Chapter 5 - The Integumentary System
the color of the skin depends on 2 factors
epidermal pigmentation
dermal circulation
Chapter 5 - The Integumentary System
People who lack ______ are very pale
pigment melanin
Chapter 5 - The Integumentary System
the epidermis contains
carotene
melanin
Chapter 5 - The Integumentary System
_____ is found in orange vegetables.
carotene
Chapter 5 - The Integumentary System
carotene is found often in
stratum corneum
Chapter 5 - The Integumentary System
carotene can be converted to
vit A
Chapter 5 - The Integumentary System
what is vitamin A needed for
photocreptors of the eye
normal epithelial tissue
Chapter 5 - The Integumentary System
melanin
brown pigment that gives skin a dark color
Chapter 5 - The Integumentary System
______ produces melanin
melanocytes
Chapter 5 - The Integumentary System
where is melanin produced
inside melanosomes
Chapter 5 - The Integumentary System
_____ transfers melanin to keratinocytes
melanocytes
Chapter 5 - The Integumentary System
skin cancer
melanoma
Chapter 5 - The Integumentary System
increased blood flow produces
red skin color
Chapter 5 - The Integumentary System
decreased oxygen content resulting in bluish skin color
cyanosis
Chapter 5 - The Integumentary System
interupptions of the dermal blood supply can lead to such conditions as
cyanosis decubitis ulcers (bedsores)
Chapter 5 - The Integumentary System
fat stored in the ________ acts to insulate the body to maintain a constant body temp
adipocytes
Chapter 5 - The Integumentary System
The elimination or giving off heat in the form of sweat
evaporation
Chapter 5 - The Integumentary System
skin exposed to UV light produces
vitamin D3 or cholecalciferol
Chapter 5 - The Integumentary System
Vitamin D is converted to ____ in the _____
calcitriol
kidneys
Chapter 5 - The Integumentary System
Catcitriol is needed for normal absorption of
calcium in the intestine
Chapter 5 - The Integumentary System
skin contains receptors for
pain touch hot cold pressure
Chapter 5 - The Integumentary System
_____ remove small amounts of waste products but not important in excretion
skin glands
Chapter 5 - The Integumentary System
______ stimulates the maintenance and repair of the epidermis and the secretion of epithelial glands
epidermial growth factor (EGF)
Chapter 5 - The Integumentary System
dermis is divided into two layers
papillary layer
reticular layer
Chapter 5 - The Integumentary System
the papillary layer of the dermis contains
blood vessels, lymphatic, and sensory nerves
Chapter 5 - The Integumentary System
function of the papillary layer
supports and nourishes the overlying epidermis
Chapter 5 - The Integumentary System
the reticular layer consists of
a meshwork of collagen and elastic fibers oreintated to resist tension in teh skin
Chapter 5 - The Integumentary System
what causes stretch marks
extensive distortion of the dermis
Chapter 5 - The Integumentary System
what forms lines of cleavage (as on the hands)
pattern of collagen and elastic fiber bundles
Chapter 5 - The Integumentary System
dermitits
inflammation that generally affects the papillary layer
Chapter 5 - The Integumentary System
located beneath the dermis, the _______ or _______ is loose connective tissue
subcutaneous layer
hypodermis
Chapter 5 - The Integumentary System
the subcutaneous layer contains
collagen and elastin fibers
Chapter 5 - The Integumentary System
the hypodermis does
stabilizes the skin’s position against underlying organs and tissues and is a site of fat storage
Chapter 5 - The Integumentary System
variations in hair color often reflexts differences in ____ produced by _______
pigment melanin
melocytes
Chapter 5 - The Integumentary System
glands that discharge an oily secretion onto hair follicles
sebaceous glands
Chapter 5 - The Integumentary System
oily secretion
sebum
Chapter 5 - The Integumentary System
the cells in a hair follicle that are responsible for forming hair
matrix cells
Chapter 5 - The Integumentary System
balding occurs when hair folicles shift from producing _________ to producing _________
terminal hairs
vellus hairs
Chapter 5 - The Integumentary System
glands of the integumentary system
sebaceous glands
sweat glands
mammary glands
ceruminous glands
Chapter 5 - The Integumentary System
sweat glands aka
sudoriferous glands
Chapter 5 - The Integumentary System
two classes of sweat glands
aponcrine
merocrine
Chapter 5 - The Integumentary System
ceruminous glands are located
ear
Chapter 5 - The Integumentary System
parts of the nails
nail body
nail bed
cuticle
Chapter 5 - The Integumentary System
as the body ages the epidermis gets:
thinner vit D production reduces melanocyte activity decines glandular activity declines blood supply to the dermis reduces the repair of damaged tissue slows down
Chapter 5 - The Integumentary System
appearance of aging epidermis
this saggy skin
looks dehydrated
