CH 10 Integumentary System (part 2)

Question 1

Stratum Lucidum

Answer 1

• layer immediately superficial to the stratum granulosum
• clear due to the accumulation of keratin fibers in cell cytoplasm
• not present in all species, but found in areas of high wear and tear like the foot pads

Question 2

Stratum Granulosum

Answer 2

• layer immediately superficial to the stratum spinosum
• cells contain keratin granules in their cytoplasm

Question 3

Stratum Spinosum

Answer 3

• layer immediately superficial to the stratum basale
• thickest in hairless regions and areas of high wear and tear
• keratinization and desquamation begin here
• aka prickle or spinous layer

Question 4

Keratinization

Answer 4

the development of the hard, protein constituent of hair, nails, epidermis, horny structures, and tooth enamel

Question 5

Desquamation

Answer 5

the process in which cell organelles gradually dissolve

Question 6

Stratum Basale

Answer 6

• aka stratum germinativum
• deepest or basal layer that continually multiply to replenish cells lost from the epidermal surface

Question 7

Cubodial

Answer 7

cube-like cells arranged in rows

Question 8

Dermis

Answer 8

layer directly deep to the epidermis

• aka the corium
• composed of blood and lymph vessels, nerve fibers, and accessory organs of the skin

Question 9

The dermis contains connective tissue which is composed of

Answer 9

• fibroblasts
• collagen
• histiocytes
• mast cells
• perception

Question 10

Fibroblasts

Answer 10

fiber - productin cells

Question 11

Collagen

Answer 11

• major fiber in the dermis
• tough, flexible, fibrous protein found in the skin, bone cartilage, tendons, and ligaments
• Kolla (glue) + -gen (to produce)

Question 12

Histiocytes

Answer 12

• phagocytic cells that engulf foreign substances
• aka tissue macrophages

Question 13

Mast cells

Answer 13

cells that respond to insult by producing and releasing histamine and heparin

Question 14

Histamine

Answer 14

chemical released in reponse to allergens that causes itching

Question 15

Heparin

Answer 15

Anticoagulant chemical released in response to injury

Question 16

Ceruminous glands

Answer 16

modified sweat glands located in the ear canal

-secrete cerumen (earwax)