During oxidation, a molecule or atom ________.
A. loses protons
B. gains electrons
C. gains protons
D. loses electrons
Answer: D
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The contraction of the piloerector muscles (pilomotor muscle or arrector pili) in humans causes __________.
A. hairs to stand on end, trapping an insulating layer of warm air next to the skin B. generation of heat to raise the body temperature C. hairs to stand on end to make the individual appear bigger D. hairs to stand on end with no apparent function E. increased ability to feel pain
The juxtaglomerular apparatus ________
A) contains granular cells in the afferent arteriole that sense blood pressure B) contains a region of chemoreceptor cells called the macula densa in the distal nephron loop C) is found where the most distal part of the ascending limb of the nephron loop touches the afferent arteriole, contains granular cells in the afferent arteriole that sense blood pressure, and contains a region of chemoreceptor cells called the macula densa in the distal nephron loop D) is found where the most distal part of the ascending limb of the nephron loop touches the afferent arteriole
Terry suffers from dissociation of memories from their emotional content as the result of an automobile accident. What system of the brain is probably damaged?
A) the prefrontal lobe B) the general interpretive area C) the limbic system D) the thalamus E) the putamen
How does the serous fluid of the pleurae function?
A. It prevents the pleurae from sliding across each other. B. It acts as a reservoir for material cleaned from the lung. C. It reduces friction between pleurae but causes them to cling together. D. It raises the oxygen content in the pleural space making respiration more efficient.