Anatomy Review (Chapter 5)

When a person's body becomes too warm, how does the integumentary system work with other body systems to maintain homeostasis?

Increased secretion of perspiration helps cool the body

"Goose Bumps" are caused by:

A. Contraction of arrector pili muscles

This epidermal cell has a role in immunity and disease resistance.

A. Langerhans cells

Albinism is the inherited inability to produce

A. Melain

The cells in a hair follicle that are responsible for forming hair are

B. Matrix cells

This pigment secreted by specialized cells in the skin is capable of absorbing ultraviolet light.

B. Melanin

Thick skin can be found on the

B. Palms

The effects of aging on the skin include

C. A decline in the activity of sebaceous gland

You stepped on a nail. List the sequential layers of the epidermis that the nail penetrated through to finally reach the dermis

C. Corneum, lucidum, granulosum, spinosum, basale

When the arrector pili muscles contract

C. Goose bumps are formed

The epidermal layer of the skin

C. Is made up of keratinized stratified squamous epithelial tissue

The layer of the epidermis that contains stem cells undergoing divisions is the

C. Stratum Basale

Which of the following structures found in the skin plays an important role in thermoregulation?

C. Sweat glands

The darker an individual's skin color

C. The more melanin their melanocytes produce

Which of the following best describes events that lead to the tanning of skin that occurs after exposure of the skin to the sun's UV radiation?

C. UV radiation stimulates increased production of melanin by melanocytes

The following are stages in the regeneration of skin following a deep wound injury: Proliferation Maturation Inflammation Migration The correct order for these events is

D. 3,4,1,2

The skin in humans

D. All of above: body's largest organ, performs functions crucial to survival, is classified as a cutaneous membrane

The dermis of the skin

D. All of the above: composed of connective tissue, thicker and lies below the epidermis, divided into papillary and reticular regions

The skin functions as

D. All of the above: protector of the body, temperature regulator, multiple sensory organ

The stratum lucidum

D. Is present only in thick skin

Which of the following is a common characteristic of thin skin?

D. Presence of sebaceous glands

This type of exocrine gland is a simple, branched gland connected to a hair follicle.

D. Sebaceous gland

This is a mixture of triglycerides, cholesterol, proteins and inorganic salts.

D. Sebum

An important vitamin that is formed in the skin when it is exposed to sunlight is

D. Vitamin D

Characteristics of thick skin include:

E. All of the above: found in palms, soles of feet and fingertips, does not contain hair follicles, contains more sweat glands than thin skin, contain epidermal ridges

Accessory structures of the skin include

E. All of the above: hair follicles, sebaceous glands, sweat glands, nails

Why would an elderly person be more prone to skin infections than a younger person?

E. All of the above: skin repairs take longer, epidermis is thinner, fewer Langerhan's cells, blood supply to dermis is reduced in the skin

Exposure of the skin to ultraviolet light

E. Both A and D: can result in a reduction in elastin fibers promoting wrinkling, can result in damage to the DNA of cells in stratum basale

These glands secrete earwax to help keep foreign particles out of the external ear canal

E. Ceruminous

Which of the following chemicals does not contribute to the color of human skin?

E. Melatonin

Which of the following structures found in the skin help prevent water loss and inhibit bacterial growth on the surface of the skin?

E. Oil glands