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Ed Rivers, a 3rd year medical student, was alone in the hospital ER one night. It was unusually quiet that night, and the resident was getting some much needed sleep. A patient, Mrs. X, was brought in showing signs of serious dehydration. Ed tried to give here water, but she vomited this back up. Feeling he must try something, and not wanting to wake the resident, Ed administered 1 liter of sterile distilled water IV. Assume for simplicity that the red blood cells contain only solutes to which the rbc membrane is impermeable, and that the rbcs and plasma are in osmotic equilibrium when the patient is brought in. The osmolarity of the rbc is 300 mOsm/L.
What is Mrs. X red blood cell volume after the infusion equilibrates with the blood and why? Also what is the osmolarity of the red blood cells and plasma AFTER equilibration?
The idea is that this arrangement will allow animals and plants to migrate between refuges. Why would such migration be significant. Examine the F1 offspring from this cross.
Male songbirds sing in spring because increasing daylength at this time stimulates testosterone production which spurs growth of song control circuits in the brains of male songbirds. Choose the best level of causation addressed by this explanatio..
Estimate expected frequencies of each individual progeny possibility based on the 1.5 M.U. distance. Do this through showing a punnet square for frequencies.
Explain a specific example of a cross in two parents, each homozygous for different traits, which would result in a phenotype that is distinct from either parental phenotype.
Assume your text provides an interesting explanation for the "dormitory effect", in which women living or sometimes working together tend to synchronize their menstrual cycles.
Use the genetic code table, translate your mRNA sequence into amino acid. if any of the mRNA codns are start or stop.
If your grandfather is a carrier for a rare recessive disease called biology and you know your grandmother and mother, who have married in to your family are NOT carriers,
Create a map of these 3 genes, including the correct order, and map distance between each gene. Describe your reasoning/show your work for both
Noah is a technician assigned to photograph chromosomes. At what stage of the cell cycle are the chromosomes sufficiently condensed that they FIRST become visible under light microscope.
Describe the similarities between electrical activity of a simulated neuron and the fast block to polyspermy that occurs during fertilization in sea urchins.
Explain why do genomes of eukaryotes need to have multiple origins of replication, whereas bacterial genomes have only a single origin?
how to Define the terms anabolic steroid. Discuss the potential risks and dangers associated with using steroids and human growth hormone.
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