Ch 4, 5 tissue repair

Question 1

regeneration

Answer 1

damaged tissue replaced by same kind of tissue

Question 2

fibrosis

Answer 2

tissue replaced by fibrous connective tissue =scar tissue

Question 3

steps in tissue repair; inflammation

Answer 3

a. cardinal signs
Redness, Heat, Swelling, Pain, immobilization
b, steps in inflammatory response
1. inflammatory chemicals released by damaged cells
-dilation of blood cells-increases the blood flow area (redness and heat)
-chemicals trigger pain receptors (pain)
2. Capillaries become leaky
-exudate leaks out of capillaries into injured areas
-swelling and pain=immobilizes the area
3. exudate contains WBC, fluid and plasma proteins
-proteins facilitate healing
-WBCs attack invaders
4. clotting occurs, scab forms

Question 4

step 2; organization and restored blood supply

Answer 4

1. clot replaced by granulation tissue
   - capillaries grow in from near by
2. epithelium regenerates
3. fibroblasts produce collagen fiber
4. debris phagocytized

Question 5

step 3; regeneration and fibrosis

Answer 5

1. scab detaches
2. fibrous tissue matures, epithelium thickens, takes on mature characteristics
3. results in fully regenerated epithelium with underlying scar tissue

Question 6

epithelium regeneration

Answer 6

very well, bone, areolar, irregular dense and blood

Question 7

nervous tissue and cardiac muscle regeneration

Answer 7

poorly

Question 8

vitamin C

Answer 8

lack of vitamin c prevents tissue healing, needed for collagen synthesis