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