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