Final answer:
Presence of dietary fat in the distal ileum contributes to production of short-chain fatty acids, which are absorbed by enterocytes in the small intestine. It does not directly affect gastric emptying or intestinal transit time.
Step-by-step explanation:
Dietary fat in the distal ileum contributes to the production of short chain fatty acids. The small intestine digests fats slowly, so when fatty chyme enters the duodenum, gastric inhibitory peptide is secreted to slow down the peristaltic movements of the intestine, allowing fatty foods more time to be digested and absorbed. Bile, released by the gall bladder, helps with the digestion of fat by meeting with the fat as it enters the small intestine, and bile salts are essential for the absorption of the end products of lipid digestion.
Short-chain fatty acids, which are produced in the colon by gut bacteria through bacterial fermentation, belong to the group of short chain fatty acids. They are water soluble and can be directly absorbed by the enterocytes in the small intestine via simple diffusion. Once absorbed, they follow the same path as monosaccharides and amino acids into the blood capillary of a villus.
Dietary fat in the distal ileum does not have a direct effect on gastric emptying or intestinal transit time.