Chapter 5

If you cut yourself and bacteria enter the wound, which of the following cells would help get rid of the bacteria?

Langerhans cells

The hair matrix contains ________.

a layer of basal cells

Sebaceous glands ________.

are associated with hair follicles

Eccrine sweat glands ________.

are present in the skin throughout the body and produce watery sweat

Bedsores ________.

are preventable by eliminating pressure points

In response to stimuli from the sympathetic nervous system, the arrector pili ________.

are responsible for goosebumps

In general, skin cancers ________.

can be reduced by limiting exposure to the sun

The papillary and reticular layers of the dermis are composed mainly of ________.

connective tissue

An individual has spent too much time sun bathing. Not only is his skin painful to touch, but small blisters have appeared in the affected area. This indicates that he has damaged which layers of his skin?

epidermis and dermis

One of the functions of the integumentary system is protection. Which of the following does not directly contribute to that function?

folic acid synthesis

Similar to the hair, nails grow continuously throughout our lives. Which of the following is furthest from the nail growth center?

hyponychium

After a skin injury, the body initiates a wound-healing response. The first step of this response is the formation of a blood clot to stop bleeding. Which of the following would be the next response?

increased production of connective tissue

Squamous cell carcinomas are the second most common of the skin cancers and are capable of metastasizing if not treated. This cancer affects which cells?

keratinocytes of the stratum spinosum

An individual using a sharp knife notices a small amount of blood where he just cut himself. Which of the following layers of skin did he have to cut into in order to bleed?

papillary dermis

Which of the following is not a function of the hypodermis?

source of blood vessels in the epidermis

The papillary layer of the dermis is most closely associated with which layer of the epidermis?

stratum basale

As you are walking down the beach, you see a dead, dry, shriveled-up fish. Which layer of your epidermis keeps you from drying out?

stratum corneum

Langerhans cells are commonly found in the ________.

stratum spinosum

Collagen lends ________ to the skin.

structure

In humans, exposure of the skin to sunlight is required for ________.

vitamin D synthesis