What happens when a constriction is placed in a flow?
What will be an ideal response?
(Pressure drops, velocity increases)
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Of the muscles listed, the only one not innervated by the pudendal nerve is the
A. external anal sphincter. B. iliococcygeus. C. puborectalis. D. pubococcygeus. E. coccygeus.
Marjorie takes an anti-anxiety drug so that she can sleep better and remain calm enough to study effectively. She begins by taking 25 milligrams every evening, but within a month this dose is no longer helping, so she takes two pills. After another month this dosage is no longer effective. This is happening because
A. she has developed tolerance, which means that her liver can no longer metabolize the drug, so it remains active for too long. B. her immune system is rejecting the drug. C. the number of receptors to which the drug binds on neurons has increased. D. the number of receptors to which the drug binds on neurons has declined.
Epithelial cells of kidney tubules may have many microvilli. What is the reason for the microvilli?
A. Protection from abrasion B. Lubrication C. Sweeping away debris D. More surface area for reabsorption
The afferent arteriole in the kidney
A) is also known as the descending limb of the nephron loop. B) empties directly into the calyx of the medulla. C) carries blood to the glomerulus. D) carries blood from glomerular capsule to the nephron loop. E) returns blood to the inferior vena cava.