Integumentary system (function and structure)

The functions of the skin include all of these except_______

• taking in nutrients

• preventing the entry of microorganisms

• retarding water loss

• regulating body temperature

Within the skin, a basement membrane can be found separating the _______ and _____.

• epidermis; hypodermis

• epidermis; dermis

• dermis; hypodermis

• hypodermis; underlying

The protective dead layer of cells of the outer epidermis is called the ___

• stratum corneum

• stratum granulosum

• stratum spinosum

• stratum basale

Melanocytes lie within the ____ of the skin.

• stratum corneum and top layers

• deepest dermis

• stratum spinosum and stratum lucidum

• stratum basale and upper dermis

Which of these phrases does not characterize the dermis?

• conical dermal papillae

• thinner in areas receiving greater friction and use.

• loss of elasticity with age and sun exposure

• muscle and nerve fibers

Adipose tissue is most abundant in the _____ layer of the skin.

• epidermal

• dermal

• subcutaneous

• transdermal

Choose the response that the body employs to raise body temperature only when the others listed have failed.

• constricted skin blood vessels

• sweat glands inactivated

• slight skeletal muscle contraction

• shivering

What is one important function of melanin?

• cause the skin to be cooler

• increase the amount of blood vessels

• strengthen the skin or eyes

• absorb harmful radiation

The epidermal ridges or fingerprints are probably caused by the ____.

• genes in the epidermis

• dermal papillae

• smooth muscle in the dermis

• amount of keratin in cells

The strength of the dermis would mainly be due to _____.

• the amount of blood vessels

• the distribution of elastic fibers

• the presence of collagen fibers

• the thickness of the layers