Humans need to ingest vitamin C every day to stay healthy Is this due to the fact that vitamin C is chemically unstable? Explain
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Humans need to ingest vitamin C every day to stay healthy Is this due to the fact that vitamin C is chemically unstable? Explain
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- “Hitting the wall” is a term marathon runners use to describe their body’s reaction once their liver and muscle cells have run out of glycogen. What strategies could a marathon runner utilize to prevent this from happening?Ob/ob knock-out (leptin deficient) mice put on abnormally high weight. These mice also cannot maintain body temperature. Explain why.How does a ketogenic diet decrease the level of urea in obese patients and increase the level of creatine in obese patients? (explain on a molecular level)
- For people who want to lose weight, one of the most popular diets is a protein-rich, carbohydrate, and fat-free diet. One risk of this diet is the formation of kidney stones. Explain whyA new energy drink in stores contains no sugar, carbs or fat. It does, however, contain relatively high concentrations of B-vitamins (B-3, B-5, B-6, and B-12) which our digestive system does not break down. If our useable energy (ATP) is supplied by cellular respiration, where would the energy this products claims to provide come from?Among the many eat-all-you-want-and-lose-weight diets that have been popular for a time is one that eliminates all carbohydrates but permits the consumption of all the protein and fat desired. Would such a diet be effective?
- Which of these vitamins can serve as a cofactor?(a) Vitamin A (b) Vitamin C(c) Vitamin DHigh blood-cholesterol levels are dangerous because of their correlation with atherosclerosis and consequent heart attacks and strokes. Is it possible to eliminate all cholesterol from the bloodstream by having a diet that includes no cholesterol? Is it desirable to have no cholesterol at all in your body? Explain your answer.Consumption of dinitrophenol by animals results in an immediate increase in body temperature. Explain the phenomenon. Why is dinitrophenol not used as a diet aid?
- Our dietary requirement for vitamin D, unlike other vitamins, turns out to be variable. Why?After a meal that contains carbohydrates, blood glucose levels usually rise gradually as carbohydrates are digested and the resulting monosaccharides are absorbed into the bloodstream. Suppose you run a test on a human with no lactase production. You would provide a dose (e.g., 25 grams) of lactose and measure changes in blood glucose levels over the next three hours. Predict how blood glucose levels would change from fasting to three hours. Justify your response using the results from the above simulation.Starch and sugar have the same number of calories per gram. However, not all vegetables are equally calorie-dense. For example, a serving of boiled sweet potato provides about 1.2 calories per gram, while a serving of kale yields only 0.3 calories per gram. What could account for the difference in the calories your body obtains from these two foods?