Unit 3: The Integumentary System

The outermost (top) layer of the epidermis is the:

Stratum corneum

Of the five epidermal layers, the only one that undergoes mitosis (to produce new cells) is the:

Stratum basale

Major functions of the skin includes protection from:

Abrasion/injury

UV radiation and sunlight

Entry of micro-organisms (bacteria)

Muscles within the skin that produce goose bumps are called:

Arrector pili muscles

The hair follicle is made up of primarily ___________ tissue.

Epidermal

The layer beneath the dermis is called the:

Hypodermis/Subcutaneous layer/Superficial fascia

Which skin layer has cells that look prickly due to prominent desmosomes and is found right above the stratum basale?

Stratum spinosum

Which layer is only found in thick skin?

Stratum lucidum

Burns can be caused by:

UV radiation/ sunlight

Chemicals

Electricity

The glands of the skin that are located in axillary/anogenital regions and activate at puberty are called:

Apocrine

What kind of tissue is the dermis made of?

Connective

90% of the cells in your epidermis are these standard "skin" cells which will eventually become filled with a water-proofing protein that give them their name:

Keratinocytes

Dermal papillae cause what structures on your hands?

Fingerprints

Which of the following is NOT true concerning the skin?

The dermis is usually thicker than the epidermis

The epidermis is composed of epithelial tissue

The hypodermis is between the dermis and the epidermis

The dermis contains arrector pili muscles and some nerve receptors

The two layers of the skin are the:

Epidermis and dermis

A needle would pierce the epidermal layers of the forearm in which order?

C, L, G, S, B

Absorption of and protection from damaging light rays is the primary function of:

Melanin

The average length of time for a cell to be produced by the stratum basale, rise to the surface, become keratinized, and shed off is about how long?

25-45 days

Sweat glands are also known as:

Sudoriferous glands

Adipose tissue is most prevalent in the __________ layer associated with the skin.

Hypodermis

A burn that causes a blister would be classified as a:

2nd degree