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Michael is a thirty year old salesman who spends approximately 4 days each week traveling to visit with customers in his region. During his routine physical he casually mentions to his physician that he seems to be sweating more profusely than normal and most rooms that once were comfortable are now too "hot". Michael also reports that he seems to be losing weight even though his appetite has increased. He also complains that he has a shortened attention span and that he always wants to be moving around. Despite the fact that he feels fatigued, Michael claims to have difficulty sleeping and seems to have more frequent bowel movements, occasionally accompanied by diarrhea. The physician checks Michael's medical history and finds that indeed he has lost 15 pounds since his last physical. Results of Michael's physical examination and tests performed by endocrinologist concluded that Michael had Grave's disease, a form of hyperthyroidism believed to be autoimmune in nature. Michael was presented with a number of possible treatment options. After considering all the options, especially the possible effects of radiation on gamete development, Michael chose surgical removal of the thyroid gland. Following successful surgery, Michael was prescribed synthetic thyroid hormone to ensure that his body was receiving adequate thyroid hormone and told to return within 2 months for a follow-up evaluation of circulating thyroid hormone concentrations. He was also cautioned to carefully monitor his calcium intake. a. Thyroid hormones exert their effects on cells in a manner similar to steroid hormones; describe the mechanism of action of thyroid hormones. b. Why would an imbalance in thyroid hormones have such widespread effects on the body?
What causes changes in milk, buttermilk, and chocolate milk over time w when left their room temperature?
Determine the amino acid sequence of a peptide and You must supply the answer as the 3-letter amino acid sequence from N-terminus to C-terminus
what type of channel is on the axon hillock of a postsynaptic cell? A. ligand gated B. voltage gated Na+, K+ C. voltage gated Na+, K+, Ca2+ D. none
compute the change in G value for the reactions
Discuss the process of natural selection as defined by Darwin. How did Darwin's theories differ from his predecessors? In your opinion, have his theories proved to be correct? Why and why not? Be prepared to backup your answers!
Discuss the principle of segregation? Explain why is it important? Determine the concept of dominance? How does dominance differ from incomplete dominance.
The citric acid cycle is described as the major pathway of aerobic catabolism, which is an oxygen- dependent degradative process. However, none of the reactions of the cycle directly involves oxygen as a reactant. Why is the pathway oxygen-depende..
A simple camera lens with focal object length fo = 9.00 cm perfectly focuses the image of an object on a photographic film located a distance 14.00 cm away from the lens.
What is meant by the 'cloning of a gene'? (Explain what it means from the perspective of the host bacteria)
A wrongly folded form of protein in brain cells which can cause diseases such as chronic wasting disease in deer and elk is the result of A) bacteria B) viruses C) retroviruses D) prions
Explain how a U-tube apparatus can distinguish between genetic transfer involving conjugation and genetic transfer involving transduction. Do you think a U-tube could be used to distinguish between transduction and transformation?
Describe gene duplication, homeobox genes, and retention of juvenile characters in the process of macroevolution. (Please be specific)
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