Integumentary System

The Langerhans cells of the integumentary system are important for:

• defense against pathogens

• skin coloration

• detecting changes in the external environment

• repair of minor breaks in skin

The function of keratin is:

• to prevent the entry of water

• to prevent the entry of pathogens

• both a and b

• both a and b and to prevent the loss of water

Which statement is NOT true of eccrine sweat glands?

• they are activated only by external warmth

• they are numerous in the palms and soles

• their secretory portions are coiled tubes

• excessive sweating may lead to dehydration

Which statement is NOT true of the epidermis?

• meiosis takes place in the stratum germinativum

• the cells die as they are pushed toward the surface

• Langerhans cells bring pathogens to lymph nodes

• the epidermis has no capillaries of its own and must rely on the dermis

The subcutaneous (SQ) tissue is made of:

• areolar connective tissue and adipose tissue

• squamous epithelium and areolar connective tissue

• adipose tissue and smooth muscle

• squamous epithelium and smooth muscle

The primary function of the stratum germinativum is:

• mitosis, to produce new epidermis

• osmosis, to prevent water loss

• mitosis, to produce new dermis

• osmosis, to contribute to sweating

The protein in the epidermis that prevent water loss is:

• keratin

• melanin

• collagen

• elastin

Encapsulated nerve endings in the skin are the receptors for:

• touch and pressure

• touch, pressure, and pain

• heat, cold, pressure, and pain

• cold and pain

The function of sebum is :

• to inhibit the growth of some bacteria on the skin

• to prevent drying of the skin

• both a and b

• both a and b and to help permit gripping by the palms

The protein that provides strength to the dermis is:

• collagen

• keratin

• elastin

• all of these provide strength to the dermis