Practice Quizzes

Chapter 3: Digestion and Absorption

1: Another name for the gastrointestinal (GI) tract is the
alimentary canal.
nasal gastric tract.
colorectal unit.
multiaccessory system.
2: The 4 major layers of the digestive system from inner to outer are
submucosa, mucosa, muscular, serosa.
mucosa, serosa, muscular, membranous.
mucosa, submucosa, muscular, serosa.
serosa, mucosa, muscular, submucosa.
3: Which organ carries food from the mouth into the stomach?
small intestine
4: Which part of the digestive tract is considered the "workhorse" of the gut, digesting and absorbing materials?
small intestine
large intestine
5: The working of segmentation and peristalsis
produce digestive enzymes in the small intestine.
secrete hydrochloric acid in the stomach.
move food through the digestive system.
all of the above
6: During _____, special carriers transport substances across cell membranes.
enzymatic hydrolysis
facilitated diffusion
lipid thrombosis
peristaltic action
7: Which is not an assisting organ of the digestive system?
salivary glands
8: The stomach lining is protected from the acid environment in the stomach by
bicarbonate that is secreted by the pancreas into the stomach.
bile that emulsifies the acid in the stomach.
mucus that is secreted by stomach cells.
pH enhancers that are secreted by the esophagus.
9: Which of the following statements is true?
There are usually four pairs of salivary glands
The flow of saliva can be stimulated by the sight or smell of food
Salivary protenase begins the digestion of protein in the mouth
Some salivary glands are found on top of the tongue
10: Which of the following nutrients needs to be digested before it can be absorbed?
vitamin C
11: What would be the result if absorption in the large intestine were reduced?
less fat would be absorbed
stool would contain excess liquid
no vitamin B12 would be absorbed
protein malnutrition would occur
12: The digestive system organ that normally contains the largest population of helpful bacteria is the
large intestine.
small intestine.
13: A fatty meal is more likely to cause symptoms in people who have GERD because fat
is soluble in water and as a result, swells in the stomach.
requires higher than normal amounts of intestinal enzymes for complete digestion.
fat stays in the stomach for a long time and creates back pressure on the esophageal sphincter.
is not digested completely, and the gas that results causes extreme enlargement of the stomach.
14: Hydrochloric acid aids protein digestion in the stomach.
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