Ch 6: Smart Book ?'s
True or false: skin cancer can develop in people of any age
True
Tactile cells are described best by which of the following?
-can be stimulated by light touch -can be stimulated by light pressure -large epithelial cells -also called merkel cells
Epidermal dendritic cells are found in which of the following strata?
-granulosum -spinosum
Function of periderm?
Layer of cells covering the developing embryonic epithelium
The ____ of the dermis forms the deeper, major portion of the dermis and extends from the papillary layer to the underlying subcutaneous layer
Reticular layer
As a result of the aging process, hair follicles can actually _______ production of hairs
Stop
The net effect of vasoconstriction of the dermal blood vessels is a shunting if blood ____ from the periphery of the body to _____ heat.
Away ; conserve
The ____ of the integument has immune cells
Stratum spinosum/dermis
some integumentary system components are not repaired following damage; these include ______ follicles, ______ glands, ______ cells, and muscle fibers
hair, exocrine, nerve
The skin houses two types of general exocrine glands: ___ glands and ___ glands
sweat and sebaceous
Function of mesenchyme?
Layer of embryonic cells that develops into the dermis
During the process of keratinization, the _____ and organelles of the cells disintegrate and the cells start to die.
Nucleus
______ cuts to the lines of cleavage often result in slow healing and increased scarring
Perpendicular
The predominant type of protein fiber found in the dermis is ______.
Primarily collagen (although it includes elastic and reticular fibers as well)
Damaged tissues are repaired in one of two ways: ______ and ______ formation
Regeneration; fibrosis
The _____ layer of the dermis consists primarily of dense irregular CT with large bundles of collagen fibers
Reticular
______ lubricates the epidermis and hair and helps make the integument water resistant
Sebum
_______ acts as a lubricant to keep the skin and hair from becoming dry, brittle, and cracked
Sebum
Skin is classified as either thick or thin based on 2 parameters: the # of epidermal _____ in the epidermis & the relative _______ of the epidermis, rather than the thickness of the entire integumentary
Strata ; thickness
The major function of merocrine sweat glands is _____
Thermoregulation
The major function of the merocrine sweat glands is ______
Thermoregulation
function of vernix caseosa
Waterproof protective covering composed of sebum and sloughed off cells
The vascular connective tissue that initially forms in a healing wound is called _______
granulation tissue
When a person is severely burned, a primary danger is ______ because the individual has lost the protective skin barrier and water escape from body tissues
Dehydration
The epidermal ridges interdigitate with the ____
Dermal papillae
The epidermal ridges interdigitate with the _______
Dermal papillae
Because skin can absorb certain chemicals & block others, it is described as _____ permeable.
Semi
In the first step of wound healing, cut blood vessels release_____ into the wound.
Blood
Each nail plate consists of pinkish nail _____, a distal whitish free ________, and a proximal part embedded in the skin called the nail _______.
Body, edge, root
Keratinocytes in the epidermis produce ______ when exposed to UV radiation
Cholecalciferol
In the first step of wound healing, blood brings ______ proteins, numerous white blood cells, and antibodies to the site
Clotting
Lines of cleavage in the skin identify the predominant orientation of ______ fiber bundles in the ______.
Collagen; dermis
vasoconstriction means that the diameter of the vessels ______, so relatively _______ blood can travel through them
Decrease/less
The _______ layer of the dermis contains areolar CT & dermal papillae
Papillary
the second step of wound healing, a ______ 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
in the dermis of the skin , ______________ fibers impart tensile strength while ____________ fibers allow some stretch and contraction in the dermis during normal movement
collagen and elastic
when the skin is stretched beyond its capacity some ______ fibers are torn and result in stretch marks, which are called ______
collagen, striae
Nerve fibers in the skin monitor sensory receptors in the _______ and ______.
dermis and epidermis
immune cells found in the epidermis are called _______
epidermal dendritic
Second-degree burns involve the _____ and part of the ______
epidermis and dermis
First-degree burns involve only the ______ and are characterized by _____, pain, and slight edema (swelling)
epidermis, redness
Mammary glands only become functional in....
pregnant females lactating females
The dermis of the skin has an extensive inner action, which refers to the _____
Distributions of nerve fibers
B/c an entire portion of skin had been lost, and water can not be retained in the area, a major concern with third degree burns is ______
Dehydration
Fingerprints are useful as a forensic tool because each individual has a unique pattern of ______
Friction ridges