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