The hormone that does the opposite of calcitonin is
A) insulin.
B) glucagon.
C) growth hormone.
D) parathyroid hormone.
E) thyroid hormone.
Question 2
In response to the arrival of acidic chyme in the duodenum, the
A) blood levels of secretin rise.
B) blood levels of cholecystokinin fall.
C) blood levels of gastrin rise.
D) blood levels of enterocrinin fall.
E) liver releases enzymes for chemical digestion.