Anatomy 110- 115 Skin Structures

Toya stepped on a tack while barefoot. It pierced all the way into the dermis. Through which strata of the epidermis did the tack pierce, from superficial to deep? 1. Stratum basale 2. Stratum corneum 3. Stratum granulosum 4. Stratum lucidum 5. Stratum spinosum

2, 4, 3, 5, 1

Which of these statements describes the papillary layer of the skin?

Dermal papillae contain capillary loops to nourish the epidermis.

Nutrients reach the surface of the skin (epidermis) through the process of ________.

Diffusion

What provides toughness to the dermis and holds water in this skin layer?

collagen fibers

The outermost layer of the epidermis is keratinized and known as stratum

corneum

What is the function of the keratin found within skin cells?

prevents water loss

The epidermis is composed of

stratified squamous epithelium

What type of tissue makes up the epidermis of the skin?

stratified squamous epithelium

Which layer of the epidermis is composed of flattened, dead, keratin-filled cells?

stratum corneum

Which vitamin is synthesized by the skin?

Vitamin D

Which of layer directly connects to the dermis?

Stratum basale

A little girl on the playground fell and scraped her knee. You notice her knee shows no signs of bleeding. Therefore, this must be only a superficial scrape to the ________.

Epidermis

Collagen and elastic fibers are common in the epidermis of the skin.

False

The epidermis is made mostly of dense (fibrous) connective tissue.

False

When an individual is exposed to extremely low air temperatures, the capillaries of the skin will swell so that blood will flush into skin capillary beds, and heat will radiate.

False

Although you get wet while swimming, which protein makes the epidermis a tough protective layer?

Keratin

Which structures are located in the epidermis?

Merkel cells or discs

Which important metabolic compound is produced by skin cells?

Vitamin D

The connective tissue composing the dermis is made of two regions: the papillary and the reticular areas.

True

The majority of the cells in the epidermis are keratinocytes.

True