A&P06 Integumentary System

The human integumentary system includes

• skin, nails, hair follicles, and sweat glands.

• the epidermis, dermis, and subcutaneous layer.

• bones and muscles.

• only one type of tissue.

Injections that are administered into the tissues of the skin are called

• intradermal

• subcutaneous

• intramuscular

• hypodermic

In the inherited disease ichythyosis, the skin is rough, brown, and very scaly because the uppermost layer cannot peel off as easily as it normally does. The part of the skin that is affected is the

• epidermis

• basement membrane

• dermis

• subcutaneous layer

Which of the following is not correct concerning the skin?

• The subcutaneous layer is between the dermis and the epidermis.

• The dermis is usually thicker than the epidermis.

• The epidermis is composed of stratified squamous epithelium.

• The dermis contains smooth muscle and nervous tissue.

In a condition called incontinentia pigmenti, the skin has deep dark splotches, due to melanin that seeps down into the dermis. Normally, melanin is confined to the

• epidermis

• basement membrane

• papillae

• hair

The skin appears yellowish if a person eats too much

• carotene

• collagen

• cyanin

• melanin

Exposure to ultraviolet light darkens skin by stimulating synthesis of

• melanin

• carotene

• hemoglobin

• cyanin

What determines the color of skin?

• The amount of melanin that melanocytes produce.

• The number of melanocytes in the epidermis.

• The thickness of the epidermis.

• The density of hair.

The melanocytes in very dark skin

• contain single, large, pigment granules.

• are more abundant than they are in light skin.

• lack pigment but shrivel up and turn black.

• contain many small pigment granules.

The nerve fibers in the dermis stimulate

• muscles and glands in the dermis.

• blood vessels in the epidermis.

• melanocytes in the epidermis.

• fat cells in the subcutaneous layer.