Digestive System EXAM ONE Flashcards
1. Which of the following is NOT an accessory structure of the digestive system?
A. Liver.
B. Gallbladder.
C. Pancreas.
D. Spleen.
E. None of above.- Correct answer is D.
2. Salivary amylase secreted into the oral cavity starts the digestion of
A. Proteins.
B. Starch.
C. Lipids.
D. Amino acids.
E. All of above.- Correct answer is B.
3. Which of these is not one of the three pairs of extrinsic salivary glands?
A. Parotid.
B. Palatine.
C. Submandibular.
D. Sublingual.
E. A and C.- Correct answer is B.
4. During which phase of gastric secretion is gastric juice released?
A. Cephalic phase.
B. Gastric phase.
C. Intestinal phase.
D. All of above.
E. None of above.- Correct answer is D.
5. Which of these is a structural modification unique to the small intestine?
A. Plicae circulares.
B. Villi.
C. Microvilli.
D. All of above.
E. None of above.- Correct answer is D.
- Parasympathetic impulses to the gastrointestinal tract generally inhibit peristalsis and secretions while impulses from the sympathetic division increase the rate of digestion.
A. True.
B. False.
- Correct answer is B.
- The endocrine functions of the pancreas are performed by the pancreatic islets, while the exocrine secretory functions are provided by the pancreatic acini.
A. True.
B. False.
- Correct answer is A.
8. What mouth part helps to mix food with saliva, moves food toward the pharynx for swallowing, and houses taste receptor cells?
A. Lips.
B. Palate.
C. Tongue.
D. Cheeks.
E. All of above.- Correct answer is C.
- What initiates the swallowing reflex?
A. Fear of choking on food.
B. The tongue rolling the bolus to the pharynx.
C. Sensory receptors detecting the bolus in the pharynx.
D. Secretion of saliva at the thought of food.
- Correct answer is C.
10.The pancreas secretes enzymes that enter the small intestine and chemically digest chyme. Choose the enzyme(s) that break(s) down fats.
A. Carboxypeptidase.
B. Pancreatic lipase.
C. Trypsinogen.
D. Pancreatic amylase.10.Correct answer is B.
11.What is the primary purpose of the liver in aiding digestion?
A. Produces digestive enzymes.
B. Produces alkaline solution to neutralize stomach acidity.
C. Produces bile to emulsify fats in the small intestine.
D. Produces substances that aid the large intestine in water absorption.
E. None of above.
11.Correct answer is C.
12.How are the components of fats absorbed in the small intestine?
A. Specific receptor proteins carry fatty acids across the intestinal wall and into the bloodstream.
B. Fatty acids are transported by active transport to the bloodstream.
C. Components of lipids diffuse through small intestinal cell membranes, are reconstructed in the cells, then carried off by lacteals as chylomicrons.
D. Components of lipids diffuse through small intestinal cell membranes and into the bloodstream where they are carried to the liver for processing.
12.Correct answer is C.
13.The enzyme salivary amylase begins to digest which molecules?
A. Proteins.
B. Carbohydrates.
C. Lipids.
D. Nucleic acids.13.Correct answer is B.
14.What does the pancreatic duct directly join to?
A. Jejunum.
B. Liver.
C. Ileum.
D. Duodenum.14.Correct answer is D.
15.Which structure does the appendix come off of?
A. Transverse colon.
B. Descending colon.
C. Ascending colon.
D. Small intestine.15.Correct answer is C.
