BSC2085 Ch. 5 Integumentary System
What is the first step of integument repair following an injury?
Bleeding and inflammation
Which of the following would result in the loss of large portions of skin and lead to increased risk of infection and fluid loss?
Burns
Which of the following is an orange-yellow pigment that is found in certain food items, such as carrots and squash?
Carotene
Which type of gland produces earwax?
Cerimunous gland
What are the two basic factors that interact to produce skin color?
Circulatory supply and pigment concentration
What are the two layers of the cutaneous membrane (skin)?
Dermis and epidermis
Differences in skin color among individuals are the result of __________.
Differences in the number of melanocytes
Which of the following is NOT an accessory structure in the integumentary system?
Epidermis
In which layers of the epidermis do mitotic divisions occur?
Germinativum and spinosa
What is the subcutaneous layer that separates the integument from the deep fascia around other organs?
Hypodermis
Which of the following layers is composed of adipose and areolar tissues and is the site where subcutaneous injections are given?
Hypodermis
Why is limited exposure to the UV light in sunlight beneficial?
It converts a steroid into vitamin D3.
When scar tissue formation continues beyond the requirements of tissue repair, __________ is formed.
Keloid
Which type of cell is the most abundant epithelial cell in the body and dominates the cellular composition of the epidermis?
Keratinocyte
Which of the following is a dark brown, yellow-brown, or black pigment produced by pigment cells in the stratum germinativum?
Melanin
Which of the following is NOT an effect of aging on the integumentary system?
Melanocyte activity increases, darkening the skin
Which gland functions in thermoregulation?
Merocrine sweat gland
Nail production begins at the __________.
Nail root
What are the two layers of the dermis?
Reticular and papillary
Which gland produces an oily secretion that lubricates the hair and skin?
Sebaceous gland
The secretion that lubricates and inhibits growth of bacteria on the skin is called __________.
Sebum
Excessive exposure of the skin to ultraviolet radiation may cause redness, edema, blisters, and pain. The presence of blisters classifies the burn as __________.
Second degree
What is the most superficial layer of the epidermis?
Stratum corneum
Which epidermal stratum is the most superficial and is composed of 15-30 layers of dead, keratinized cells that eventually are shed from its surface?
Stratum corneum
Which epidermal layer is found only in thick skin?
Stratum lucidum
