Final answer:
Goblet cells are found in the mucosa of the small intestine and produce intestinal juice, which is a slightly alkaline mixture of water and mucus.
Step-by-step explanation:
The mucosa of the small intestine contains goblet cells that produce intestinal juice. Intestinal juice is a mixture of water and mucus, slightly alkaline in nature. It is secreted in response to the distention of the small intestine or the irritating effects of chyme on the intestinal mucosa. About 0.95 to 1.9 liters of intestinal juice are secreted each day.