Skin

Question 1

Skin consists of 2 layers:

Answer 1

Epidermis

Dermis

Question 2

Epidermis:

Answer 2

Outer most protective layer made of dead, keratinized epithelial cells

Question 3

Dermis:

Answer 3

The underlying layer of connective tissue composed of blood vessels, sensory nerve endings, hair follicles, and glands

Question 4

Layers of epidermis from outer to inner:

Answer 4

Stratum corneum
Stratum lucidum
Stratum granulosum
Stratum spinosum
Stratum basale

Question 5

Melanin:

Answer 5

Epithelial cells contain this protein pigment which protects against radiation from the sun

Question 6

Where does mitosis occur?

Answer 6

Stratum basale

Question 7

Eccrine sweat glands:

Answer 7

Regulate body temperature by releasing a watery secretion (sweat) that evaporates from the surface of the skin

Question 8

Apocrine sweat glands:

Answer 8

Contains bits of cytoplasm from the secreting cells. The cell’s debris attracts bacteria, which causes body odor

Question 9

Where are apocrine sweat glands found?

Answer 9

In the armpits and groin area

Question 10

Sebaceous glands:

Answer 10

Release an oily secretion (sebum) through the hair follicles that lubricates the skin and prevents drying

Question 11

Sebum:

Answer 11

Produced by holocrine secretion

Question 12

Appendages of the skin:

Answer 12

Hair and nails- both composed of keratin

Question 13

The epidermis is classified as:

Answer 13

Tissue

Question 14

You have been given a sample of tissue that has pillar-shaped cells arranged tightly together, the tissue you have is:

Answer 14

Columnar epithelium

Question 15

Stem cells of the epidermis:

Answer 15

Keratinocytes of the stratum basale

Question 16

Keratinocytes:

Answer 16

Give rise to cells that differentiate as they move toward the surface

Question 17

What happens when the body is cold?

Answer 17

Responds by contracting a small smooth muscle in the dermis called arrector pili

Question 18

Hypodermis:

Answer 18

• Layer of adipose tissue that provides insulation from heat and cold
• Helps anchor the skin to underlying organs

Question 19

Layer of skin that is in thick skin:

Answer 19

Stratum lucidum

Question 20

Function of integumentary system: (6)

Answer 20

Protection
Water retention
Thermoregulation
Vit D synthesis
Cutaneous sensation
Nonverbal communication