Which of the following is NOT a function of the GI system according to the material?

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Multiple Choice

Which of the following is NOT a function of the GI system according to the material?

Explanation:
The GI system’s roles include moving food through the tract (motility), secreting digestive enzymes to break down nutrients, and digesting and absorbing nutrients for use by the body. Hormone production by the GI tract is part of its regulation of digestion, but hormones are released as secretions into the bloodstream to act as signals (endocrine signaling), not excreted as waste. Excretion implies eliminating substances from the body, while GI hormones are secreted for regulatory purposes. Therefore, the statement that the GI system excretes hormones isn’t consistent with its usual functions.

The GI system’s roles include moving food through the tract (motility), secreting digestive enzymes to break down nutrients, and digesting and absorbing nutrients for use by the body. Hormone production by the GI tract is part of its regulation of digestion, but hormones are released as secretions into the bloodstream to act as signals (endocrine signaling), not excreted as waste. Excretion implies eliminating substances from the body, while GI hormones are secreted for regulatory purposes. Therefore, the statement that the GI system excretes hormones isn’t consistent with its usual functions.

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