What anatomical structure is located in the renal sinus?
A) major calyx
B) nephrons
C) renal columns
D) renal pyramids
A
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At the end of 8 weeks, why is the conceptus considered a fetus?
A. All the primary germ layers are formed. B. The amniotic cavity has formed. C. All of the organ systems are present. D. The neural tube and yolk sac have formed. E. The mesoderm has formed.
Modified smooth muscle cells in the wall of the afferent arteriole that secrete renin are called
A) macula densa cells. B) juxtaglomerular cells. C) extraglomerular mesangial cells. D) podocytes. E) principal cells.
Negative feedback loops are ________
A) self-amplifying cycles B) not homeostatic mechanisms C) associated with "vicious circles" D) homeostatic mechanisms E) usually harmful
Which statement regarding age as a predisposing factor is false?
A. Children are more susceptible to diseases than adults because of their age. B. Children and the elderly are more susceptible to disease due to age. C. This predisposing factor can be controlled by an individual. D. As people live longer they become more susceptible to disease.