Chapter 5: Integumentary System (1 Question) 📖 🅰
When the body temperature rises above normal
blood flow to the skin increases
The epidermis lacks
blood vessels
Functions of the integumentary system include all of the following except: maintenance of body temperature, synthesis of vitamin C, excretion of salts and wastes, protection of underlying tissue.
synthesis of vitamin C
The subcutaneous layer is beneath
the dermis
Keratinization is
dead cells at the surface packed with tough protein - keratin.
The macrophages found in the epidermis are the
dendritic/ langerhans cells
The finger-like projections from the dermis into the epidermis that are responsible for fingerprints are called
dermal papillae
The deep layer of skin is called the _______________ and is composed of ____________________.
dermis; connective tissue layer mainly of collagen with elastic fibers, reticular fibers, and fibroblasts
Hair follicles and fingernails originate in the _______________ but are actually derived from _____________ tissue.
dermis; subcutaneous
Two distinct layers of the skin are
epidermis and dermis
Where do you fine thick skin?
On palms, soles, fingers, toes.
Where do you find thin skin?
The rest of the body
The _______________ are the most abundant cells in the epidermis.
keratinocytes
Sebum is
oily secretion produced by sebaceous glands
Mammary gland (breast) Modified apocrine sweat glands. Secretion of product?
Breast of both sexes contain very little glandular material. Milk producing glands that develop only during pregnancy and lactation.
Keratin is the skin pigment that protects it against ultraviolet light. True or False?
False (Melanin)
Both the epidermis and the dermis continually undergo shedding and regeneration. True or False?
False (Only the epidermis)
Lanolin
Sheep sebum
Apocrine gland (dermis) Secretion of product? Where?
Simple coiled tubular gland with large duct; thicker, milky, contains fatty acids Axilla (armpit), groin, areola, beard area (hair follicle)
The outer layer of the skin is called _______________ and is composed of _______________.
epidermis; keratinized stratified squamous epithelium
The fibrous protein that is responsible for the strength and water resistance of the skin surface is
keratin
Protective functions of the skin include all the following except protection: of the joints, against harmful chemicals, against infections, against water loss.
of the joints
Melanin provides _______________ by absorbing _______________.
protection; UV radiation;
The _______________ contains the cells that undergoing mitosis.
stratum basale
The most numerous and widespread sweat glands in the body are the apocrine sweat glands. True or False?
False (merocrine/ eccrine sweat glands0
The epidermis contains sensory receptors. True or False?
False (the dermis)
The sebaceous gland produces a waxy secretion in the external ear canal. True or False?
False. (the ceruminous gland)
What does thin skin possess?
Hair follicles, sebaceous/oil glands, and sudoriferous/sweat glands.
Which gland secretes is product in an enclosed vesicle?
Merocrine gland
_______________ glands discharge an oily secretion into hair follicles.
Sebaceous
Ceruminous glands Secretion of product? Functions?
Secretion combines with sebum and dead epithelial cells to form ear wax (cerumen) Keeps eardrum pliable, waterproofs the canal, kills bacteria.
Holocrine gland,. Function?
Secretion consists of broken cells. Keeps skin and hair from becoming dry, brittle, and cracked.
The skin color is basically determine by the amount of melanin in the skin. True or False?
True
The skin is able to synthesize vitamin D when exposed to sunlight. True or False?
True
The subcutaneous layer contains
another connective tissue layer below the dermis. Primarily fat tissue.
Most body odor is the result of bacterial metabolism of the secretions produced by _______________ gland?
apocrine sweat gland
The layer of the skin the provides protection against bacteria as well as chemical and mechanical injuries is the
epidermis
Ceruminous glands of the ______________ secrete ______________.
external ear canal; earwax/cerumen
Sebaceous/oil gland (dermis) Secretion of product? Where?
flask-shaped glands with short duct opening; sebum: oily secretion Lips, glans penis, labia minor, eyelids (hair follicle)
What does thick possess and not possess?
has sweat glands; no hair follicles or sebaceous (oil) glands.
The primary type of cell found in the epidermis is the
keratinized stratified squamous epithelium
The most numerous sweat glands are
merocrine/ eccrine glands
The skin has five types of glands
merocrine/eccrin sweat glands, apocrine sweat glands, sebaceous glands, ceruminous glands, and mammary glands
Functions of the skin:
resistance to trauma and infection, other barrier functions, vitamin D synthesis, sensation, thermoregulation
The oil substance on skin is produced by
sebaceous Glands
The layer of the epidermis that contains melanocytes is the
stratum basale
Contraction of the arrector pili muscles cause
"goose bumps"
Merocine/eccrine gland (subcutaneous). Secretion of product? Where?
Coiled tubular gland; watery perspiration that helps cool the body. Forehead, palms, and soles. (epidermis)
Most of the body heat is produced by
contraction of skeletal muscles
Usually a decrease in the amount of oxygen in the blood will result in _______________ of the skin?
cyanosis
