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A 58-year-ld man with chronic alcoholism presents with abdominal pain, fever, and hematemesis. Laboratory studies showed elevated serum levels of liver enzymes (AST, ALT) and decreased serum albumin (2.2 g/dL) the patient dies of bleeding esophageal varies. At autopsy, the patient%u2019s testacies are small and brown. By microscopy, there is no evidence of spermatogenesis. Which of the following response to injury best describes the testes in this patient?
Metaplasia
Hperplasia
Dysplasia
Artrophy
Hyertropy
What is the difference between spermatids and sperm cells? What is the name of the transformation of spermatids into sperm cells?
Explain how cell division and the sexual reproduction help in genetic variability of organism. How do both the meiosis and sexual reproduction (fertilization) generate offspring which differ genetically from parents?
Scientists can use mutants to study metabolic pathways. These organisms have mutation in gene encoding a metabolic pathway enzyme that results in inactivation of that enzyme.
Such a condition is frequently accompanied by diarrhea, which causes a loss of body water. On the basis of what you have learned about osmotic water flows, describe why diarrhea may occur.
Glucose oxidase is an enzyme that can be used for measurements of glucose levels by combining this reaction with an oxygen probe.
theoretical genetic strains of a virus are used to simultaneously infect a culture of host bacteria. Of 10,000 plaques scored, the genotypes in the following table were observed.
Barbiturates cause hypoventilation that is the slower-thannormal rate of breathing, since they suppress the respiratory centers in the brain. What happens to the red blood count of a habitual user of barbiturates? Explain in details.
Determine would you expect yearly net N accumulation in vegetation to be higher in young say, 20 year old, medium or mature 100 year old forests?
Non-competitive inhibitors of enzymes change the slope and Km of the Lineweaver Burk graph compared to no inhibitor.
Why is the gene coding for ribosomal RNA used for establishing phylogenetic relationships and how does this compare to previous methods for placing organisms in appropriate taxa
Describe the sequence of events that lead to the exocytosis of acetylcholine in the synaptic cleft of a postganglionic parasympathetic neuron.
Ebony is a seven year old child who didnt feel well and was complaining of a sore throat. By the next morning, Ebony had a bright red tongue and a rash across her chest.
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