Chapter 6 learn smart
The scalp normally loses between how many hairs per day
10-100
And what important way does a freckle differ from a nevus
A freckle is an area of excessive melanocyte activity/nevus is caused by an increase in melanocyte numbers
The memory glands of the breasts are modified____________ sweat glands
Apocrine
Two functions of the skin
Barrier to water loss Heat regulation
In the development of embryonic skin, the __________ layer gives rise to the epidermis, and the _______________ Gives rise to the dermis
Basal ; Mesenchyme
The first step of one healing cut blood vessel releases what into the wound
Blood
In the second step of wound healing what forms
Blood clot
A hemangioma is a congenital anomaly that results in skin discoloration due to_______________ that proliferate and form a benign tumor
Blood vessels
Each nail plate consists of a pinkish nail ______ and a distal whitish free ________
Body;edge
The three recognizable zones along the length of the hair are
Bulb, root, shaft
____________ Is it yellow orange pigment acquired from vegetables like carrots, corn and squash
Carotene
Keratinocytes in the epidermis produce _____________ when exposed to UV radiation
Cholecalciferol
Lines of cleavage in the skin identify the predominant orientation of ___________ fiber bundles in the dermis
Collagen
The predominant type of protein fiber found in the dermis is
Collagen
The word reticular means "network" and refers to the web like meshwork of ________ fibers
Collagen
The size of a hair follicle walls are organized into two principal concentric layers an outer ____________ tissue root sheath and an inner ____________ tissue root sheath
Connective ; epithelial
The dermis is ___________ to The epidermis and contains primarily________________
Deep ; collagen fibers
The epidermal ridges interdigitate with the
Dermal papilae
What contains the capillaries that supply nutrients to the cells of the epidermis
Dermal papilae
The nails, hair and exocrine glands of the skin or known as
Epidermal appendages
Second-degree burns involve the ______________ and part of the ___________
Epidermis ; dermis
Third-degree burns involve the _____________, dermis and _________________ Layer, which often are destroyed
Epidermis; Subcutaneous
First-degree burns involve only the __________ and are characterized by _____________ pain and slight Edema
Epidermis; redness
When the skin has been damaged what integumentary system components are not repaired
Exocrine glands Hair follicles Nerves
Apocrine and merocrine sweat glands release their secretory products by the process of ____________
Exocytosis
Cerumen, together with the tiny hairs along the ear canal, helps trap ___________________ or small ___________ and keeps them from reaching the eardrum
Foreign particles, insects
How long are keratinocytes of the epidermis usually present
Four weeks
Fingerprints are useful as a forensic tool because each individual has a unique pattern of
Friction ridges
The vascular connective tissue that initially forms in a healing wound is called
Granulation tissue
Epidermal Dendrid excels are found in which of the following strata
Granulosum and Spinosum
Normal skin color results from a combination of colors of __________ , melanin and carotene
Hemoglobin
During our lives we produce three kinds of hair what are they
Lanugo Vellus Terminal
Periderm
Layer of cells covering the developing embryonic epithelium
Mesenchyme
Layer of embryonic cells that develops into the dermis
Individual individual ages, skin repair process takes _________
Longer
In the third step of wound healing, _______________ within The wound begin to remove the clotted blood
Macrophages
At the nail root in the proximal end of the nail body the nailbed thickness to form the nail_______
Matrix
One exposed to the sun the _______________ become more active in secrete a protein that gives the skin a chance look
Melanocytes
Harris found almost everywhere on the body except the sides and _________ of the hands and fingers, the sides and __________ of the feet and toes, the lips and portions of external genitalia
Palms;soles
__________________ cuts to the lines of the cleavage often results in slow healing and increase scarring
Perpendicular
Cavernous hemangiomas, sometimes called ____ ____ stains, involve a large dermal _____ _______ in my last a lifetime
Port wine ; blood vessels
The apocrine sweat glands become active and produce secretory products during
Puberty
In the fourth step of wound healing, ______________ Of the epidermis occurs
Regeneration
What part of the dermis forms the deeper, major portion of the dermis and extends from the papillary layer to the underlying subcutaneous layer
Reticular layer
Sebaceous glands are activated primarily by______________During puberty in both sexes
Sex hormones
Merocrine sweat glands are classified as _________________________________ glands that release their secretion onto the surface of the skin
Simple, coiled, tubular
Repetitive mechanical stressors applied to the integument stimulate mitotic activity in the __________ cell of the stratum ____________
Stem; basale
And thin and thick skin the layers that contain living cells are
Stratum basel, Stratam Spinosun and stratum granulosum
Does secretion from Merocrine sweat glands are carried to the surface of the epidermis via ____________________. The secretions of the apocrine sweat glands are carried into _______________
Sweat ducts ; hair follicles
The skin house is two types of general exocrine glands, what are they
Sweat glands Sebaceous glands
differences in hair density are due primarily to differences in its
Texture and pigmentation
The major function of merocrine sweat glands is
Thermoregulation
There are three main variations in the epidermis. These variations are ________ , colorations and skin markings
Thickness
As a result of the aging process, Hair follicles produce
Thinner hairs
The delivery of drugs to the skin through the use of a patch is called what
Transdermal administration
T/F? Regeneration in the stand replace is damaged or dead cells with the same cell type in restores organ function
True
T/F? Skin cancer can develop and people of any age
True
T/F? The amount of melanin in their skin is determined by both heredity and light exposure
True
A puberty terminal hair replaces_______ hair in the armpits and pubic regions of the body
Vellus
The skin is best described as
Water resistant
vernix caseosa
Waterproof protective covering composed of sebum and sloughed off cells
The subcutaneous layer is also known as the
hypodermis
The color of hair is the result of
melanin production