You are a student intern in the research and development department of a pharmaceutical company. You have discovered a compound that destroys the common cold virus in cultured human cells. Chemical characterization reveals that carbon, hydrogen, and oxygen are present, in a 20:40:4 ratio of C:H:O. What chemical class is this compound? Experiments in rats show that neither oral nor injectable
treatment with the compound was effective in destroying the virus. Discuss some possible reasons for this lack of effectiveness.
What will be an ideal response?
The relatively low amount of oxygen and high carbon and hydrogen indicate that this compound is probably a lipid. Oral administration may result in digestion of the compound so that none is absorbed into the blood. Lipids are not highly soluble in water, and because blood is a watery medium, the injected lipid may not transport well in the blood. Also, human cells as well as the viruses may behave differently in culture compared to in a real patient.
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One __________________ is the amount of force required to accelerate 1 kg of mass at 1 m/s 2 . ________________________________________
Fill in the blank(s) with the appropriate word(s).
Select the correct statement about equilibrium
A) The weight of the endolymph contained within the semicircular canals against the maculae is responsible for static equilibrium. B) Hair cells of both types of equilibrium hyperpolarize only, resulting in an increased rate of impulse transmission. C) Cristae respond to angular acceleration and deceleration. D) Due to dynamic equilibrium, movement can be perceived if rotation of the body continues at a constant rate.
Which of the following vessels directly supply blood to glomerular capillaries?
a. Efferent arteriole b. Interlobar artery c. Arcuate artery d. Afferent arteriole e. Interlobular arteriole
Which aspect of self-regulatory training requires trainees to actively think about how they are doing and what they can do to improve their efforts?
A. Evaluation reaction B. Self-monitoring C. Static learning D. Practice behavior E. None of the above