Exam 5: The Integumentary System

The design of a person's epidermal ridges is determined by the manner in which the papillae rest upon the dermal ridges to produce the specific pattern known as handprints, footprints, and fingerprints. Which of the following statements is true regarding these prints or ridges?

We are told that every surface we touch is teeming with bacteria, and bacteria are found in the pools we swim in, the water we wash with, and on the hands of friends. Why are we not inundated with bacterial infections on our skin?

The white crescent portion of the nail is called the .

The epidermis consists of five layers of cells, each layer with a distinct role to play in the health, well- being, and functioning of the skin. Which of the following layers is responsible for cell division and replacement?

Despite its apparent durability, the dermis is subject to tearing. How might a person know that the dermis has been previously stretched and/or torn?

A needle would pierce the epidermal layers of the forearm in which order?

The skin is not able to receive stimuli because the cells of the epidermis are not living and therefore there are no sensory receptors in the skin.

Melanoma is a form of skin cancer that arises from melanocytes. Melanoma is most common in Caucasians between 40 and 70 years of age. Explain why Caucasians would have a greater incidence of melanoma.

Figure 5.1Using Figure 5.1, match the following: -What are six of the functions of the epidermis?

Figure 5.1Using Figure 5.1, match the following: -In addition to the synthesis of vitamin D, keratinocytes are able to carry out some other biologically important functions. Name at least two of these other functions.

Burns are devastating and debilitating because of loss of fluids and electrolytes from the body. How do physicians estimate the extent of burn damage associated with such dangerous fluid loss?

Although the integument is a covering, it is by no means simple, and some of its functions include )

The 68- year- old patient was admitted to the hospital medical floor with a diagnosis of chronic bronchitis. His wife asks the nurse why his skin looks blue. How would you explain cyanosis to the patient and his wife?

Joe just burned himself on a hot pot. A blister forms and the burn is painful. Joe's burn would best be described as a third- degree burn.

Figure 5.2Using Figure 5.2, match the following: -Hypodermis

The composition of the secretions of the eccrine glands is .

A splinter penetrated into the skin of the sole of the foot, almost to the papillary region of the dermis. Which layer of the epidermis would be the final layer injured?

The pinkish hue of individuals with fair skin is the result of the crimson color of oxygenated hemoglobin (contained in red blood cells) circulating in the dermal capillaries and reflecting through the epidermis.

The apocrine sweat glands are fairly unimportant in thermoregulation.

Eyebrow hairs are always shorter than hairs on your head because _ .