Module 9: UT Instapoll

The pH within the stomach is about 2, and most digestive enzymes in the small intestine have a pH optimum of 7-8. When the stomach's acidic food mass starts to pass into the small intestine a hormone signal is released into the blood. To be effective, that hormone should trigger the release of which of these?

bicarbonate into the small intestine

Which animal must eat a larger proportion of its weight in food each day: a house cat or an African lion caged in a zoo?

Cat, because smaller mammals have a higher metabolic rate per unit body mass

Which of the following is an example of hydrolysis reactions that occur in the digestive system?

Breaking down starch to sugar molecules

Where in the digestive tract does the most digestion by hydrolysis occur?

Small intestine