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Charley shows up at his doctors office complaining of a feeling of weakness, which is getting worse, chronic fatigue and loss of appetite. His weight compared to that of 6 months ago is down about 10 pounds. He denies dieting. After obtaining a complete history, Charley's physician performs three tests.
1. Analysis of the patients serum cortisol level shows the level is below normal.
2. Synthetic CRH is injected IV the serum collected after this again reveals cortisol levels below normal.
3. Cosyntrin, a synthetic ACTH is injected IV, the serum collected afterwards shows normal levels of Cortisol. Explain where the problem specifically is located. Using the above test results (numbered 1-3) as proof of your answer. Go through each step (1-3) showing what each step proves.
which of the following best describes the role of lactose in the lac operon?1.lactose binds to the lac operon promoter
How is Phagocytosis different than Exocytosis? Define replication, transcription, and translation with regard tothe "central dogma." What gives proteins such a dominant role inbiochemistry?
What is causing the evolutionary arms race with pathogens? Provide an example to illustrate your answer. How can we slow down antibiotic resistance? What is the evolutionary history of HIV? Why do some people live with HIV and not get sick?
Lab mice are immunized with a measles vaccine. When the mice are challenged with the measles virus to test the strength of their immunity, the memory cells do not completely prevent replication of the measles virus.
Discuss the factors implicated in metastasis of tumors: lack of cellular adhesion and absence of cellular barriers.
Think about the sequence 3'-T-C-T-C-T-A-C-G-T-5' and calculate the total number of covalent bonds joining the nucleotides in each strand?
What is different about the photopigment in the reaction center,compared with other photopigments in the antenna complex?
Recent scientific and public policy discussions have focused on some natural and man-made substances, external to the body, and whether or not these substances interact with the endocrine system. The topic of "endocrine disruptors" is being popula..
What does hyptonic, hypertonic, and tonicity mean? What's the difference between these three words?
q1. in the 5-7 million years that hominid lineage has been diverging from its common ancestor with the great apes
Transcription initiation in eukaryotes requires the coordinated action of many proteins. Which protein is responsible for recruitment of splicing factors to the CTD of RNA Polymerase?
It is thought that the Beta Thalassemia mutation, similar to the sickle cell anemia mutation, is an example of balancing polymorphisms.
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