Question

question 14
1 pts
chemical digestion requires the secretion of ____ into the lumen of the gi tract.
digestive enzymes
bile
chyme
digestive enzymes and bile

question 15
1 pts
cck is an intestinal hormone that
causes the pancreas to increase secretion of exocrine high in enzymatic content.
opposes the influence of gastrin on gastric parietal cells.
stimulates contraction of the gallbladder so that bile can pass into the duodenum.
all of the above

question 16
1 pts
____ is the passage of substances through the intestinal mucosa into the blood or lymph.
secretion
absorption
elimination
ingestion

Explanation:

Question 14

Chemical digestion involves breaking down food using substances. Digestive enzymes break down macromolecules, and bile (from the liver/gallbladder) helps emulsify fats, both aiding chemical digestion. Chyme is partially digested food, not a secretion for digestion. So the correct option is the one including both.

CCK (Cholecystokinin) has multiple roles: it stimulates the pancreas to secrete enzyme - rich exocrine fluid, opposes gastrin's effect on gastric parietal cells (reducing gastric acid secretion), and stimulates gallbladder contraction to release bile into the duodenum. So all the given effects are true for CCK.

Absorption is defined as the process where substances pass through the intestinal mucosa into the blood or lymph. Secretion is releasing substances into the GI tract, elimination is removing waste, and ingestion is taking food in. So the correct term is absorption.

Answer:

D. digestive enzymes and bile

Question 15