The hormone gastrin is released in response to:
A) the presence of food in the stomach.
B) contraction of the gastroesophageal sphincter.
C) relaxation of the anal sphincter.
D) the presence of the bacteria Helicobacter pylori in the stomach.
Correct Answer:
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Q16: _ are units of matter that cannot
Q17: Which structure prevents swallowed food from entering
Q18: Coordinated muscular contractions that move food through
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