Chapter 5: Integumentary System

Chapter 5: Integumentary System

When comparing the dermis with the hypodermis,
A. the dermis has more fat cells than the hypodermis.
B. the dermis has more vascular tissue than the hypodermis.
C. the dermis contains dense connective tissue; the hypodermis contains loose connective tissue.
D. the dermis contains melanocytes; the hypodermis does not.
Answer C

Keratinocytes:
A. produce skin pigments in cell organelles called melanosomes.
B. are found in both the dermal and epidermal layers of the skin.
C. are special cells of the immune system.
D. are responsible for the permeability characteristics of the epidermis.
Answer D

Fingerprints are produced by projections into the dermis called:
A. striae.
B. cleavage lines.
C.
When the arrector pili muscles contract
A) the body is able to lose heat.
B) "goose bumps" form on the skin.
C) the hair on your arms and legs begins to curl.
D) the sweat glands empty their contents onto the surface of the skin.
E) no change is noted on the skin surface.
Answer: b
Level: 1

43. Which of the following statements is false?
A) Most sebaceous glands are connected by a duct to the upper portion of the hair follicle.
B) Secretions from sebaceous glands provide protection against bacteria.
C) Secretions from sebaceous glands oil the hair and skin.
D) Sebaceous glands are an example of apocrine glands.
E) Sebaceous secretions are lipid soluble.
Answer: d
Level: 1

44. The activity of apocrine sweat glands
A) produces cerumen.
B) leads to body odor.
C) gives the skin a healthy glow.
D) produces sweat on the palm of the hand.
E) produces an oily secretion.
Answer: b
Level: 1

45. Sweat glands
A) aid in cooling the body.
B) serve as "anchors" for the arrector pili muscles.
C) produce a secretion that oils the hair and skin.
D) produce a secretion that protects the body from growth of bacteria.
E) are not involved in the homeostasis of body temperature.
Answer: a
Level: 2

46.
D) constriction of the sweat glands in the cheeks.
E) increased permeability of superficial vessels.
Answer: b
Level: 2

59. Which vitamin begins its synthesis in the skin exposed to ultraviolet light?
A) vitamin A
B) vitamin B
C) vitamin C
D) vitamin D
E) vitamin E
Answer: d
Level: 1

60. Which of the following statements concerning vitamin D is false?
A) Vitamin D begins its synthesis in the skin when the skin is exposed to ultraviolet light.
B) Vitamin D causes the kidney to excrete calcium.
C) Vitamin D is necessary for the uptake of calcium from the intestine.
D) Vitamin D is necessary for the formation of bones and teeth.
E) Vitamin D is important for calcium homeostasis.
Answer: b
Level: 2

61. Eskimos wear a great deal of clothing and have limited exposure to U.V. light, but do not suffer from vitamin D deficiency. A possible explanation is
A) they do not need vitamin D.
B) their exposure to U.V. light in the summer will last for a year.
C) they get enough vitamin D in their diet of fish and marine mammals.
D) they do not require sunlight for vitamin D formation.
E) their bodies produce vitamin D another way.
Answer: c
Level: