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The article "Brain Shunt Tested to Treat Alzheimer's" (San Francisco Chronicle, October 23, 2002) summarizes the findings of a study that appeared in the journal Neurology. Doctors at Stanford Medical Center were interested in determining whether a new surgical approach to treating Alzheimer's disease results in improved memory functioning. The surgical procedure involves implanting a thin tube, called a shunt, which is designed to drain toxins from the fluid-filled space that cushions the brain. Eleven patients had shunts implanted and were followed for a year, receiving quarterly tests of memory function. Another sample of Alzheimer's patients was used as a comparison group. Those in the comparison group received the standard care for Alzheimer's disease. After analyzing the data from this study, the investigators concluded that the "results suggested the treated patients essentially held their own in the cognitive tests while the patients in the control group steadily declined. However, the study was too small to produce conclusive statistical evidence."
a. What were the researchers trying to learn? What questions motivated their research?
b. Do you think that the study was conducted in a reasonable way? What additional information would you want in order to evaluate this study?
Explain why all mutations are not necessarily harmful? Does changing the sequences of nucleotides always result in a different amino acid sequences? Explain.
Provide a brief description of steps involved in producing and purification of fusion proteins and two main advantages of using fusion proteins
Generally, aneuploidies are caused by the impaired assortment of chromosomes during meiosis. For example, they are caused when the homologous chromosomes of pair 21 do not separate and, therefore, gametes with two chromosomes 21 and gametes withou..
Describe two ways that the internal anatomy of the fetal pig differs from that of a human.
Explain why the re-polarization phase of the myocardialaction potential correlates with the beginning of diastole. Also, explain why the myocardium cannot be repeatedly stimulated toproduce a continuous, tetanus-like contraction.
The singularity of a black hole doesn't exist since all black holes have a finite size is located at the center of the event horizon is found on the surface of the event horizon can only be located if the black hole is in a binary system
What is solar radiation management? What are the advantages of SRM? What are the potential negative consequences of its use?
Describe in detail the process of meiosis as it occurs in an organism with a diploid chromosome number of 4 (2n = 4). Include labeled diagrams in your discussion.
Why does a houseplant growing on a windowsill tend to grow towards the window?
How do genes impact health and disease? (n.d.). Retrieved March 19, 2017, from http://www.genesinlife.org/genes-your-health/how-do-genes-impact-health-and-disease
Both endocrine and nervous system are major regulating system of the body; but nervous system has been compared to an airmail delivery system and the endocrine to pony express. Briefly explain the comparison.
Which of the following statements by a patient of a cancer center who has a new diagnosis of non-Hodgkin lymphoma (NHL) demonstrates a sound understanding of the diagnosis and treatment of the health problem?
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