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Aspirin is a weak acid (see figure below) that is taken up into the bloodstream by diffusion through cells lining the stomach and the small intestine. Aspirin crosses the plasma membrane of a cell most effectively in its uncharged form; in its charged form it cannot cross the hydrophobic lipid bilayer of the membrane. The pH of the stomach is about 1.5 and that of the lumen of the small intestine is about 6.0. Is the majority of the aspirin absorbed in the stomach or in the intestine? Explain your reasoning.
Why is an action potential conducted in only one direction, from an axon hillock to an axon terminal?
describe in a one paragraph. Contrast the functions of the pulmonary vs. the systemic circuits.
If you started a PCR protocol with 10 double stranded molecular of DNA, Determine how many double stranded molecules of product would you have after 5 cycles of PCR?
A kan-r, tet-r plasmid is treated with the restriction enzymeBglI, What anitbiotic would you put in the growth medium to ensure that each colony has the plasmid, Which phenotype will contain Neurospora DNA
predict the effects of a drug that activates the sympathedic nervous system on blood pressure and heart rate. How would this drug affect the three factors that determin blood pressure?
In prokaryotes, which of the following is true?
Radish flowers may be red, purple, or white. A cross between a red-flowered plant and a white-flowered plant yields all-purple offspring. The part of the radish we eat may be oval or long, with long being the dominant characteristic.
Explain how an ectopic pregnancy occurs. Discuss how it occurs, the organs and structures that are affected, and treatment options. Apply all related medical terms and their meanings
what are four natural occuring enzymes used in Recombinant DNA technology, and describe their natural and technological use.
A researcher is testing the effect of sunlight on plant growth. She takes 2 plants and places them in full sun, 2 are placed in a moderately sunny environment and 2 are placed in the dark. Those placed in the dark are A. positive control
Hypothermia and hyperthermia can cause serious damage to the human body. Research and explain these impacts at the cellular level.
What is the percent concentration of oil in the first, second, and third trophic levels in our food chain?
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