BIO25 Lecture Exam 2

When the body is warm _____ glands will be stimulated to produce sweat.

??

A common type of skin cancer is squamous cell carcinoma, where squamous cells form tiny tumors in the skin that look like a tiny pink bump or scab on the surface of the skin. What type of cell is overgrown in a squamous cell carcinoma?

???

The precursor to Vitamin D that is produced by the skin is _____ .

???

What is the function of Vitamin D?

Calcium absorption

In what layer are blood vessels, connective tissue, hair follicles and sweat glands found?

Dermis

What is the outtermost layer of skin?

Epidermis

Which type of gland is found in the armpit and genital area, responsible for milky and odorous sweat?

appocrine gland

The _____ smooth muscle contracts to form "goosebumps" when cold or stimulated by the sympathetic nervous system.

arrector pili

_____ is a non-living keratinized structure produced by the _____ .

hair; hair follicle

What type of tissues are found in the epidermis

keratinized stratified squamous

The _____ (latin: little moon) appears whitish because a thickened underlying stratum basale obscures the underlying blood vessels.

lunula

What type of cells are responsible for building bone?

osteoblasts

What type of cells are responsible for breaking down bone?

osteoclasts

An individual using a sharp knife notices a small amount of blood where he just cut himself. Which of the following layers of skin did he have to cut into in order to bleed?

papillary dermis

The layer of epidermis that contains stem cells and produces all other layers is the _____ .

stratum basale

what is keratin

tough fibrous protein

Sebaceous glands __________

Are related to the hair follicle

The mitotically active basal cells that produce hair are found in the _____ .

hair matrix

There are many functions of the skin that are necessary for homeostasis. When a person is severely burned, it can be life threatening. The patient will be immediately placed on IV fluids, and carefully wrapped in sterile, clean dressing. Why?

Loss of skin can cause severe loss of water and dehydration.

What is the deadliest form of skin cancer? What type of cell is involved?

Malignant melanoma; melanocytes

What type of epithelium is found in the skin?

Stratified Squamous Epithelium

What is the function of a melanocyte?

To produce pigment that protects from UV radiation

Bones continue to be built and broken down after development, into adulthood.

True

What is the major mineral stored and regulated by bones

calcium

What type of tissue is found in the reticular layer of the dermis?

dense irregular connective tissue

The projections or folds of the epidermis-dermis junction are formed by the _____ , located in the _____ .

dermal papilla : dermal papillary layer

The layer of skin that contains blood vessels, nerves, lymphatics, hair follicles, and sweat glands is the _____ .

dermis

What specific layer of skin is found directly below the stratum basale of the epidermis?

dermis - papillary layer