B0216 Prelab #4 18 out References Mailings Review View Name: Lab Section: 1. In
ID: 3507055 • Letter: B
Question
B0216 Prelab #4 18 out References Mailings Review View Name: Lab Section: 1. In the elderly, blood supply to the dermis is reduced and sweat glands are less active. What effect(s) would this combination have on an elderly person? (10 pt) 2. Jack & John are watching a football game at home when their space heater explodes. Each suffers burns to his legs. Jack has a partial-thickness, second-degree burn while John has a full-thickness burn. Predict the effect 3. Twins Sally & Sue had rose tattoos placed on their buttocks. As they got older Sally decided to have her tattoo about where the dye is deposited in the skin.) Sue did not have her tattoo removed. What will the tattoo look their burns will have on skin regeneration and hair growth. (10 pt) removed. Why is it difficult to surgically remove a large tattoo without causing scar tissue to form? (Hint: Think like as Sue ages? Why will the appearance of the tattoo change? (Assume Sue does not gain lots of weight.) (10 4. a. Humans can have a wide variety of skin colors, and yet all humans have approximately the same number of b. It appears that a combination of selective pressures in evolution have caused these genetic differences in appears that the evolution of skin color strongly correlates to UV radiation exposure resulting in skin color melanocytes. How is this possible? (5 pt) melanin production. One of the main contributing selective factors appears to be exposure to UV radiation. It that is effective, but not too effective in screening out UV radiation. Why would this be important in the evolution of skin color in humans? (5 pt) MacBook Air 8 0Explanation / Answer
1. Changes in the skin on aging are unavoidable and occur irrespective of any insults to skin or other injuries. The following are the characteristics of aging skin:
2. A second degree burn involves the Epidermis and Dermis. The area appears red and swollen. In third degree burns, the subcutaneous tissue can also be involved along with the Epidermis and Dermis. The area appears charred and white.
Second degree burns: Red blisters may appear accompanied by fibrinous exudate. They usually heal without scarring but some pigmentation may occur. Hair regrows on the affected area.
Third degree burn: These burns are far more serious and may not even cause pain. They can cause charring, thickness of skin, waxy color, nerve damage. They can cause severe contracture and scarring with no hair growth in the area.
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