Briefly describe the steps in epidermal wound healing
What will be an ideal response?
In response to an epidermal injury, basal cells of the epidermis surrounding the wound break contact with the basement membrane. The cells then enlarge and migrate across the wound. The cells appear to migrate as a sheet. When epidermal cells encounter each other they stop migrating due to contact inhibition. Migration of the epidermal cells stops completely when each is finally in contact with other epidermal cells on all sides. Epidermal growth factor is also secreted to stimulate the basal stem cells to divide and replace the ones that have moved into the wound. Epidermal cell division eventually regenerates the strata of the epidermis.
You might also like to view...
When a muscle atrophies, its muscle fibers
a. split lengthwise b. decreases in mass and becomes weaker c. increase in diameter d. undergo mitotic cell division e. dissolve and are replaced by fibrous scar tissue
During which phase of the uterine cycle is the secretion of progesterone not at a significant level?
a. menstrual phase b. proliferative phase c. secretory, or progestational, phase d. both (a) and (b) above. e. both (b) and (c) above.
Urea diffuses from the collecting duct into the medullary interstitial fluid maintaining to the medullary interstitial fluid osmotic gradient.
a. true b. false
The spinal cord ends at the
A. sacrum. B. coccyx. C. 5th lumbar vertebrae. D. 2nd lumbar vertebrae.