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level: Tissue Repair

Questions and Answers List

level questions: Tissue Repair

Question	Answer
Tissue repairs:	Mostly skin
What is needed for tissue repair?(3)	Cells that can divide, A signal to know to divide, Structural framework to rebuild the tissue on
Why do we need cells that can divide?	To copy/ produce more cells to replace the damaged ones
Where does the signal to divide come from?	The damaged cells
What two things is the type of repair based on?	Blood supply in injured area, Nutritional levels/ nutrient state of the individual who’s hurt
Types of tissue repair:	Regeneration, Fibrosis
Replacing the injured tissue with the same type (so no scars); cell needs to be able to divide	Regeneration
Replacing the injured tissue with scar tissue	Fibrosis
First stage of repair:	Inflammation
The severed blood vessels are bleeding; damaged cells release inflammatory chemicals (signal to the body that there’s damage). White blood cells,fluids,and clotting protiens go to the injured area and WBC attack pathogens, and fluid and clotting protiens help form a clot, which dries and forms a scab.	inflammation
Signal from damaged cells	Inflammatory chemicals
When clot dries, forms a:	Scab
Three things attack pathogens at injured site and form a clot:	white blood cells, Clotting proteins, Fluids
Second stage of repair:	Organization
Stem cells (in epithelial tissue)copy to replace the damaged cells and scab	Organization
What is the scab replaced with? (Organization)	Granulation tissue
In organization, what does connective tissue fill with?	Fibrous tissue
Function of fibers/ fibrous tissue in organization?	The fibers provide framework for the repairs, Hold the cut together
Third stage of tissue repair:	Regeneration or Fibrosis
Epithelial tissue remains the same	Regeneration
connective tissue has scar tissue;, blood vessels slowly heal , but never is perfectly the same again	Fibrosis