Integumentary System

Which layer of the epidermis contains actively dividing cells?

• stratum corneum

• stratum basale

• stratum granulosum

• stratum lucidum

When you scratch your skin, what comes off as white flakes are mostly cells from the stratum:

• corneum

• spinosum

• basale

• granulosum

When you are overexposed to sunlight, your body produces less melanin to protect you from the ultraviolet light.

• true

• false

What are the layers of the SKIN in order from superficial to deep?

• corneum, lucidum, granulosum, spinosum, basale

• epidermis, dermis, subcutaneous layer

• subcutaneous, dermis, epidermis

The "tanning" effect (darkening of the skin) that occurs when a person is exposed to the sun is somewhat protective due to:

• added layers of epidermis that thicken the skin

• an increased concentration of keratin that "toughens" the skin

• an increased blood supply that carries the heat of the sun away

• increased production of melanin that helps to block ultraviolet light

What is the arrector pili and what is it attached to?

• a muscle that is attached to the hair shaft

• connective tissue that is attached to sebaceous glands

• connective tissue that is attached to sweat gland

• a muscle that is attached to the hair follicle

When the body temperature rises above normal, dermal blood vessels are likely to constrict.

• true

• false

Which of the following is NOT a substance secreted to help with the regulation of pain impulses

• enkephalins

• serotonin

• endorphins

• heparin

The most external skin region is composed of:

• simple columnar epithelium

• dense fibrous connective tissue

• stratified squamous epithelium

• adipose

Which part of the skin contains melanocytes?

• stratum corneum

• stratum lucidum

• stratum spinosum

• stratum basale