The calorific value is highest for:
1. carbohydrate
2. protein
3. fat
4. fiber

The coenzyme NAD, found in all living cells and involved in redox reactions, is related to:
1. vitamin D
2. riboflavin
3. niacin
4. vitamin K

A serious eating disorder marked by binge eating, followed by methods to avoid weight gain is:
1. obesity
2. bulimia
3. anorexia nervosa
4. pellagra

Situated between the circular muscle layer and the longitudinal muscle layer in the lower esophagus, stomach, and intestines, the major nerve supply to the gastrointestinal tract that controls GI tract motility is the:
1. myenteric plexus
2. muscularis
3. submucosal plexus
4. serosa

HCl secreted by the gastric mucosa does not:
1. kill bacteria
2. catalyze the hydrolysis of peptide bonds
3. denature dietary proteins
4. cause the activation of pepsin

A high rate of red blood cell destruction, with elevated levels of bilirubin in the blood, causes ______.

The only exopeptidase amongst the following is:
1. trypsin
2. elastase
3. chymotrypsin
4. carboxypeptidase

Digestion of polymers is brought about by:
1. polymerization
2. absorption
3. condensation
4. hydrolysis

An accessory digestive gland amongst the following would be:
1. Pyloric glands
2. Crypts of Lieberkuhn
3. Salivary glands
4. Oxyntic glands

Which layer in the wall of the gastrointestinal tract has an inner circular and outer longitudinal layer?