Iii quiz 1-3

Quiz 1 GI

Most nutrients are absorbed through the mucosa of the intestinal villi via

active transport

Which of the following best describes the human gut microbiome?

the community of microorganisms that live in the gastrointestinal tract

Which substance is enterohepatically circulated?

biliary acids

Enzymes involved in digestion of the 3 macronutrients as well as sodium bicarbonate are produced by the _____________________ and released into the duodenum.

pancreas

In general, in which portion of the gastrointestinal tract does most absorption occur?

small intestine

Match the following enzymes/hormones to their substrate/function: amylase

polysaccharides

Match the following enzymes/hormones to their substrate/function: lipase

triglycerides

Match the following enzymes/hormones to their substrate/function: pepsin

protein - stomach

Match the following enzymes/hormones to their substrate/function: trypsin

protein - small intestine

Match the following enzymes/hormones to their substrate/function: bile

emulsification of fat

Match the following enzymes/hormones to their substrate/function: cholescystokinin

stimulates the release of bile and other pancreatic juices

Match the following enzymes/hormones to their substrate/function: gastrin

stimulates the release of gastric acid

Which of the following is not a function of the liver?

production of gastric juice

Bile salts break up the fat globule into smaller fat droplets. This role of bile salts is best described as ________.

lipid emulsification

A doctor consulting a patient that recently has had their gall bladder removed would likely advise ________.

eating foods that are low in fat

All but one of the following is a function of the low pH (highly acidic) found in the stomach. Select the description below that does NOT reflect a role of stomach acid.

The low pH (acidic) of the stomach breaks apart dietary lipids into their fatty acid tails and lipoprotein head groups for digestion.