Exam 7: A: Skin and Its Appendages

The hypodermis is a subcutaneous layer rich in adipose and loose fibrous connective tissue.

A group of active basal cells,together with its vertical column of migrating keratinocytes,is called a dermal proliferating unit,or DPU.

Radiation can account for both heat loss and heat gain.

Albinism is the inability of the body to form melanin.

Blisters can be the result of damage to the desmosomes in a layer of skin.

The shedding of epithelial elements from the skin surface is called desquamation.

Heat loss by the skin is controlled by a positive feedback loop.

An abnormally thick region of the stratum basale is called a callus.

The keratinocytes of the skin are examples of antigen-presenting cells.

Fingerprints are an example of the friction ridges of the skin.

Although the ducts of the eccrine sweat glands come through the epidermis,the actual secretory portion is located in the dermis.

Fever is always detrimental to the body,so the body temperature should be reduced to normal as soon as possible.

Because sweat can contain ammonia,urea,and other waste products,it plays a major role in the excretion of body wastes.

Malignant hyperthermia occurs as a result of exposure to certain types of anesthetic agents or muscle relaxants.

Cleavage lines and Langer lines refer to the same thing.

A person with a body temperature of 38° C would need to be treated for hypothermia.

The skin has the ability to convert cholecalciferol to vitamin D when the skin is exposed to sunlight.

A large amount of fat can be stored in the hypodermis.

Surgical incisions that are made perpendicular to cleavage lines tend to heal with less of a scar.

Apocrine and eccrine glands are the two types of sebaceous glands.