The Integumentary System 5 The Integumentary System
The skin and its accessory structures (e. g The skin and its accessory structures (e.g., fingernails) make up which of the following organ systems? Epidermis system Skin system Integumentary system Dermal system Answer: c. Integumentary system
The saying “beauty is only skin deep” is only pertinent to the __________ layer, which is outwardly visible. epidermal dermal hypodermal integumentary Answer: a. epidermal
The principal role of melanin is to __________. give one that “healthy tan look” keep the body cool provide a waterproof layer shield the nucleus from damage by ultraviolet radiation Answer: d. shield the nucleus from damage by ultraviolet radiation
The principle role of keratin is to __________. give one that “healthy tan look” keep the body cool provide a waterproof layer shield the nucleus from damage by ultraviolet radiation Answer: c. provide a waterproof layer.
The touch sensors of the epidermis are the _________. keratinocytes tactile cells epidermal dendritic cells melanocytes Answer: b. tactile cells
A patient taking a drug that inhibits cell division (such as certain chemotherapy drugs) would expect which layer of the epidermis to be most noticeably affected? Stratum corneum Stratum lucidum Stratum spinosum Stratum basale Answer: d. Stratum basale
Fingerprints are copies of __________. dermal papillae epidermal papillae dermal ridges epidermal ridges Answer: d. epidermal ridges
The principle tissue found in the dermal layer is ___________. dense irregular connective tissue stratified squamous epithelum dense regular connective tissue areolar connective tissue Answer: a. dense irregular connective tissue
Which of the following types of sweat gland secretion is thought to deter insects? Eccrine Apocrine Ceruminous Mammary Answer: c. Ceruminous
The most important role of the eccrine sweat gland is _________. milk production stress-induced sweating body temperature regulation earwax production Answer: c. body temperature regulation
overexposure to the sun overheating harmful bacteria One critical function of sebum, in addition to roles in waterproofing and skin softening, is that it provides protection against ____________. overexposure to the sun overheating harmful bacteria abrasions or cuts to the skin Answer: c. harmful bacteria
The arrector pili muscle contracts to allow for hair growth. What is one major function of arrector pili muscle contraction that is particularly important in nonhuman mammals? The arrector pili muscle contracts to allow for hair growth. The arrector pili muscle contracts to shed dead hairs. The arrector pili muscle contracts to alarm an approaching predator. All of the above are true. Answer: c. The arrector pili muscle contracts to alarm an approaching predator.
Excessive estrogen secretion from the ovaries A female patient with excessive facial hair growth may have which of the following ailments? Excessive estrogen secretion from the ovaries Inadequate secretion of insulin from the pancreas Inadequate secretion of thyroid hormone from the thyroid gland Excessive secretion of androgens from an adrenal tumor Answer: d. Excessive secretion of androgens from an adrenal tumor
inadequate body temperature maintenance Loss of one’s skin, such as with severe burns, leads to an increased risk of __________. bacterial infection inadequate body temperature maintenance dehydration all of the above Answer: d. all of the above
The skin plays a role in the manufacture of vitamin ______. B C D Answer: d. D
Which of the following types of skin cancer is the most dangerous? Basal cell Squamous cell Melanoma All are equally dangerous. Answer: c. Melanoma