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1. a hypothetical drug is administered which dilates blood vessels in the periphery (decreasing resistance) without directly affecting other tissues. Which of the following will occur as a consequence of administering this drug?
a. an increase in blood pressure and an increase in cardiac outputb. an increase in blood pressure and decrease in cardiac outputc. a decrease in blood pressure and increase in cardiac outputd. a decrease in blood pressure and decrease in cardiac output
2. Another hypothetical drug decrease heart rate without directly affecting any other cardiovascular parameter has been injected into a group of rats. what changes in cardiac output (CO), blood pressure (MAP) and resistance (TPR) would be expected?
a. decreased CO, increased MAP, increased TPRb. increased CO, increased MAP, decreased TPRc. increased CO, decreased MAP, decreased TPRd. decreased CO, decreased MAP, increased TPR
Recent experiments in a lab have focused on trying to understand cellular mechanisms that underlie epilepsy. Many of the studies involve recording electrical activity in neurons from brains of adult fruit flies
The intrinsic rate of increase (r) for northern elephant seals about 0.15 (per annum). We will assume that population regulation is linearly density dependent.
The ATP solution used in this experiment had a concentration of 0.25 percent, which represents the normal physiological cytoplasmic concentration of ATP.
when purified viral genome (nucleic acid) is added to an in vitro system containing all of the factors necessary for protein synthesis, no proteins are made.
Purines and pyrimidines play crucial part in cellular energy systems signaling and in the production of DNA and RNA.
The definition of antigen and the chemical characteristics of antigens, The definition of antigen and the chemical characteristics of antigens, haptens and how they become antigenic.
Develop a hypothesis relating to the amount of dissolved oxygen measured in the water sample and the number of fish observed in the body of water.
Two solutions are separated by a semipermeable membrane that is permeable to sodium but not chloride or potassium ions. Solution A on the left contains a solution that is 100 mM NaCl, while Solution B on the right has a concentration of sodium chl..
Assume you are a clinician in a small hospital and are monitoring the progression of myclonic epilepsy in twin boys. One twin remains only mildly affected by the condition.
Suppose you have a bacterium, which is normally killed in an hour when growing in a medium containing penicillin. This bacterium is an auxotroph and requires tryptophan for growth.
In corn snakes, wild type color is brown. One autosomal recessive mutation causes hte snake to be orange and another causes snake to be black.
If you wanted to make a 0.5M solution of MgSO4, how many grams of MgSO4 would you need? Assume the volume of the solution is one liter. Show your work.
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