When observing a slide of the renal medulla, it an be seen that most of the medulla consists of
A. cross sections of proximal and distal convoluted tubules.
B. longitudinal sections of nephron loops and collecting ducts.
C. renal corpuscles.
D. glomeruli.
E. a mixture of all of these structures.
Answer: B
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Generally the hormones secretin and cholecystokinin which are released by duodenal enteroendocrine cells will ________
A) speed the churning of the stomach B) increases the output of stomach acid C) speed the activity of the jejunum D) slow the activities of the stomach
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