Bio 141 A&P: lab quiz 2

How do the cells of the stratum granulosum receive nutrients and oxygen?

By way of diffusion from the capillaries of the dermis

Which layer of the epidermis is most superficial?

stratum corneum

What is not true of connective tissue? It contains both cells and noncellular, nonliving material. Its matrix is produced by the cells within the tissue. Its matrix contains fibers. All connective tissues contain elastic fibers.

All connective tissues contain elastic fibers.

Which of the following statements correctly describes thick skin? Which of the following statements correctly describes thick skin? Thick skin does not contain keratinocytes. The stratum basale is the thickest stratum. The epidermis contains four different layers or strata. It is found in the skin of the soles and palms.

It is found in the skin of the soles and palms.

Someone grabs your arm to pull you out of the way of an on-coming car. Which structure of the skin allowed you to feel the deep pressure of that grab?

Lamellated corpuscle

Name the four subcategories of connective tissue proper.

Loose connective tissue, dense connective tissue, reticular connective tissue, and adipose connective tissue

Which tissue predominantly contains fibers that form a netlike support structure? Areolar connective tissue Elastic cartilage Reticular connective tissue Dense regular connective tissue

Reticular connective tissue

Which gland is found deep in the dermis and empties into hair follicles? Ceruminous Sebaceous Apocrine Eccrine

Sebaceous

Which tissue is best suited for exchange of gases between the blood and the body's tissues?

Simple squamous epithelium

Epithelial tissues can be classified according to cell shape. __________ epithelial cells are scalelike and flattened.

Squamous

State the three shapes of epithelial cells.

Squamous, cuboidal, and columnar

The dermal papillae are

The dermal papillae house tiny blood vessels where oxygen and nutrients diffuse into the extracellular fluid of the dermis and up into the cells of the avascular epidermis.

What is the difference between simple epithelia and stratified epithelia?

There are multiple layers of cells in stratified epithelia and single row of cells in simple epithelia

What structure stands hairs on end, causing piloerection?

arrector pili muscle

A third-degree burn is a very severe burn. It can cause additional complications in the body. Choose all possible concerns that may occur due to a third-degree burn. difficulty maintaining body temperature decreased bone density infection electrolyte imbalances dehydration

difficulty maintaining body temperature infection electrolyte imbalances dehydration

For each of the following structures, indicate whether it is located in the epidermis or the dermis: keratinocyte. Dermis Epidermis

epidermis

The cuticle around a nail is the: perionychium. lunula. eponychium. hyponychium.

eponychium

All connective tissue is derived from an embryonic tissue known as __________.

mesenchyme

Sebum is a(n) __________.

oily mixture that lubricates skin and hair Sebum also has antimicrobial properties to protect the skin from infections

Select the tissue that is a simple epithelium. transitional pseudostratified areolar dense regular

pseudostratified

Which layer of the epidermis is the deepest?

stratum basale