There will a beginning 5 point deduction (each day) for any late reports. 1. Exp
ID: 3476630 • Letter: T
Question
There will a beginning 5 point deduction (each day) for any late reports. 1. Explain why is it important that the epidermis serve as a barrier against UV rays, yet not block them completely? 2. During the aging process, the skin becomes drier, wrinkled, and slower to heal. Knowing that these are normal structural changes, how would you advise a middle- aged person to safeguard his or her skin as a protective organ? 3. (a) Describe the possible" evolutionary basis for skin color (b). What additional insight can you provide regarding skin color? 4. Many people think that bones in our bodies are dead. This is understandable, since we associate bones with graveyards, Halloween and leftovers. What explanation can you give your younger brother or sister that this is true or not true? 5. By analyzing bones one can determine sex, health (partial medical history), age, and maybe even general profession. Explain how is it possible to get this information from a preserved skeleton. 6. Compounds such as lead, zinc, and arsenic may accumulate in the hair and nails Chemical toxins form pesticides and pollutants may accumulate in the adipose tissue of the hypodermis. Discuss some clinical settings where this knowledge might beExplanation / Answer
1. Epidermis serves as a barrier to UV rays. But it is important that this barrier should not act as a complete block to UV rays as these rays have some positive effect on body. Too much exposure of body to UV rays is hazardous as it causes different kinds of problems. Some major problems caused by over exposure of UV rays are;
Skin cancers; exposure of body to UV rays for longer periods causes sk8n cancer as UV rays can be carcinogenic if body is exposed consistently for longer periods.
2. Damage to immune system; Repeated overexposure of UV rays can cause damage to our immune system.
3. Sunburns; UV rays are also known to cause sunburns.
4. Impaired vision: UV rays can damage eyes and can cause impairment of vision.
Though UV rays being hazardous to body if body is exposed for longer duration to it. But these rays also serve some important functions in our body. These rays are required by the body for the synthesis of Vitamin D .
These rays also regulate cell division. This is evident from the fact that a skin condition called Psoriasis in which skin cells grow at faster rate resulting in itching and development of patches on skin and this condition is known to be controlled by the exposure of skin to UV rays.
Thus despite having some negative effects on our body, UV rays serves some important functions to out body thus epidermis should act as a barrier to it to control its exposure but should not completely block it.
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