I need help with this homework please. Extra Credit Essay Questions These questi
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Question
I need help with this homework please.
Extra Credit Essay Questions These questions are worth a maximum of 10 points in total (2.5 pts. each) on the lecture exam if nswer each of the four essays correctly (partial credit will be granted as appropriate). You limited to one (1) paragraph for each essay, and any sources used must be cited appropriate (Wikipedia is not a viable source, and anything you did not already know when you arrived in A&P; the start of the semester must be cited). Please type your answers (double-spaced with an attache works cited list) and hand them in the day of the lecture exam. These essays will not be accepted after you have left the exam room under any circumstances. While you may discuss these questions with one another, you may not ask the instructor about them and you must compose your own essays. 1. Under what conditions is the hormone insulin released and from which anatomical structure? Describe the effect of insulin release into the blood stream. is this a posit negative feedback loop? Name at least one disease where the insulin-release mechanism is faulty and describe the effects of the malfunction 2. We now know that exposure to sunlight is vital to normal bone growth and maintenance Explain the mechanism by which sunlight promotes bone strength. What disorder arises if you are not exposed to enough sunlight, impairing this mechanism? How can individuals in traditionally-overcast locations overcome this problem? 3. You have a friend who goes to her doctor for her yearly physical, and the doctor tells her that she is morbidly obese and must lose weight. She chooses to cut fat out her diet completely and instead choose foods that contain Oles why tra instead of normal fats. Explain this decision might be detrimental to your friend's physiology 4. Many fitness instructors recommend drinking Gatorade after strenuous exerci ter. Using the principles of tonicity, explain the benefits of ingesting such a drink during and after exercising. What might occur if you have an extremely strenuous and only drink pure water? workout Ce 8 ShiltExplanation / Answer
1. Insulin is released by beta cells of islets of langerhans in pancreatic cells when gluose concentration in the blood is high. When blood glucose increases, a signal is sent to pancreas to release insulin that again sends a signal to liver to stop secreting more glucose. This is a positive feedback indicating that increase in level of glucose leads to increase in level of insulin.Beta cells destroyed due to an autoimmune disease leads to no secretion of insulin, hence glucose levels in the blood is always high. This is called type1 diabetes. Polyuria, polydipsia, dry mouth,fatigue and weight loss are common symptoms associated with type 1 diabetes.
2. Ultraviolet B photons are absorbed by 7-dehydrocholesterol present in the skin, leading to its transformation to previtamin D3, which is rapidly converted to vitamin D3. Biologically active Vitamin D3 helps in endochondral bone formation and promote bone resorption by increasing the number of osteoclasts. It also helps in calcium and phosphorous absorption into the bone indirectly. Osteoporosis may occur if sufficient sunlight is not obtained. People in overcast conditions should either have vitamin D supplements or whenever find sunlight may stand under it for few minutes.
3.Olestra synthesized from sucrose not only gets rid of unwanted fat from foods but also negatively affects body's ability to absorb essential vitamins like D,A,E and K. The complex formed between fats and olestra faces irregular movements across intestinal walls and does not get easily absorbed. Side effects included cramps, gas and loose bowels etc.
4. Sports drinks like Gatorade contain sugar(gluocose) and electrolytes like sodium and potassium a. It can improve the tonic composition of the body because during exercise we lose out on Na and K which needs to be balanced with these kind of energy drinks. Extremely strenous workout followed by drinking water may make us very tired or in some cases faint due to loss of essential electrolytes. However, supplementing the person with electrolyte based drinks can improve the situation.