Tissues, Organs, and Homeostasis

Question 1

organ

Answer 1

2(+) tissue types working together

system: combo of organs working together

Question 2

integumentary system

Answer 2

• skin + accessory organs (hair, nails, glands)

- important for maintaining homeostasis

Question 3

skin layers/regions

Answer 3

2 main regions: epidermis and dermis

- subcutaneous layer: under skin, between dermis and internal structures, fat storage

Question 4

integumentary functions

Answer 4

• protection (pathogen invasion, physical harm, water loss)
• regulate body temp
• sensory receptors
• synthesizes chemicals (melanin, vitamin D)

Question 5

epidermis

Answer 5

• thin, outermost layer of skin
• epithelial tissue (stratified squamous)
• uppermost dead cells filled w/keratin (waterproof barrier)

Question 6

langerhans cells and melanocytes

Answer 6

epidermis;

l: macrophage white blood cell
m: produce melanin for protection against UV light

Question 7

homeostasis

Answer 7

ability to maintain a constant internal environment in the body

Question 8

skin cancer in epidermis

Answer 8

basal cell carcinoma (most common, least deadly)

melanoma (least common, most deadly)

Question 9

dermis

Answer 9

thick inner layer, dense fibrous connective tissue, elastic collagen fibers, blood vessels provide nutrients, sensory receptors, glands

Question 10

nails

Answer 10

protective covering

Question 11

hair follicles

Answer 11

dermis, hair grows from epidermal cells

Question 12

oil glands

Answer 12

hair, produces sebum, lubrication of hair and skin

Question 13

sweat glands

Answer 13

dermis, regulate body temp

Question 14

homeostasis: negative feedback

Answer 14

stimulus -> sensor -> control center -> effect -> return to normal

eg thermoregulation

Question 15

homeostasis: positive feedback

Answer 15

eg birth: secretion of oxytocin -> uterine contractions -> loops