Exam 7: A: Skin and Its Appendages

Most of the body is covered by protective thick skin.

Goose pimples,elevation of the testes,and erection of the nipples result from the contraction of muscles in the dermis.

Besides changing the rates of metabolism,the primary means of controlling body temperature is through changes in the size of blood vessels in the skin.

The presence of hemosiderin and bile pigments in the skin can cause the skin to appear cyanotic.

Vitiligo is an acquired condition that results in loss of pigment in certain areas of the skin.

The hair itself is composed of three layers: the shaft,the cortex,and the cuticle.

Blisters,severe pain,generalized swelling,and edema are characteristic of third-degree burns.

The epidermis is referred to as the true skin.

Because vitamin D is a compound that influences several important chemical reactions,it can also be classified as an enzyme.

Terminal hair is the coarse pubic and axillary hair that develops at puberty.

In thin skin,some of the strata of the skin may be absent.

Fingernails are composed of heavily keratinized epidermal cells.

The body's temperature control center is located in the hypothalamus.

Thick skin and thin skin refer to the dermis and the epidermis.

One way to stimulate hair growth is to cut it or shave it.

The reticular layer of the dermis serves as an attachment point for both smooth and skeletal muscles.

One end of the arrector pili muscle is attached to a hair follicle.

The stratum lucidum is superficial to the stratum basale.

Normally about 10% to 12% of all cells in the stratum basale enter mitosis each day.

Malignant melanoma has been steadily increasing in the United States for the past 20 years.