Q. The _____________ layer of the alimentary canal contains loose connective tissue, glands, blood and lymphatic vessels, and nerves.
A. mucosa
B. submucosa
C. muscular layer
D. serosa
Answer- submucosa
Q. Activities of the digestive system are generally increased by _________________ nervous stimulation.
A. sympathetic
B. parasympathetic
C. somatic
D. autonomic
Answer- parasympathetic
Q. The purpose of the soft palate is to __________________.
A. house extra taste buds
B. sense temperature of food before it is swallowed
C. produce saliva and enzymatic secretions
D. close off the nasal cavity during swallowing
Answer- close off the nasal cavity during swallowing
Q. Compared to the others listed below, which type of tooth is more likely to be involved in grinding food?
A. incisor
B. cuspid
C. premolar
D. molar
Answer- molar
Q. 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
Answer- tongue
Q. Which salivary glands produce the most viscous saliva with lots of mucus?
A. sublingual glands
B. submandibular glands
C. parotid glands
D. serous cells
Answer- sublingual glands
Q. 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
Answer- sensory receptors detecting the bolus in the pharynx
Q. The main part of the stomach is the _______________ of the stomach.
A. cardiac region
B. fundic region
C. body
D. pyloric region
Answer- body
Q. Intrinsic factor is secreted by which cells of the gastric glands?
A. mucous cells
B. chief cells
C. peptic cells
D. parietal cells
Answer- parietal cells
Q. During which stage of gastric secretion do gastric glands actually begin secreting gastric juice?
A. cephalic phase
B. gastric phase
C. intestinal phase
D. enterogastric reflex
Answer- cephalic phase
Q. 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
Answer- pancreatic lipase
Q. What hormone does the small intestine release in response to acidic chyme?
A. cholecystokinin
B. secretin
C. digestin
D. gastrin
Answer- secretin
Q. 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
Answer- produces bile to emulsify fats in the small intestine
Q. 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.
Answer- Components of lipids diffuse through small intestinal cell membranes, are reconstructed in the cells, then carried off by lacteals as chylomicrons.
Q. What is the primary function of the large intestine?
A. to complete the absorption of most nutrients
B. to house gas-producing bacteria
C. to rid the body of toxins
D. to compact, store, and eliminate feces
Answer- to compact, store, and eliminate feces
Q. Where does the greatest amount of digestion occur?
A. small intestine
B. stomach
C. large intestine
D. liver
Answer- small intestine
Q. Which term does not belong with the others?
A. teeth
B. mastication
C. esophagus
D. tongue
Answer- esophagus
Q. Which gland is closest to the joint between the mandible and temporal bone?
A. sublingual
B. pancreas
C. submaxillary
D. parotid
Answer- parotid
Q. The portion of a tooth below the gums is the _____.
A. dentin
B. crown
C. root
D. pulp
Answer- root
Q. The enzyme salivary amylase begins to digest which molecules?
A. proteins
B. carbohydrates
C. lipids
D. nucleic acids
Answer- carbohydrates
Q. Where are the palatine tonsils located?
A. larynx
B. pharynx
C. trachea
D. esophagus
Answer- pharynx
Q. The surface area of the stomach is enhanced by the presence of folds called _____.
A. rugae
B. villi
C. microvilli
D. plicae
Answer- rugae
Q. Where would the least amount of bacteria be found?
A. small intestine
B. colon
C. stomach
D. pharynx
Answer- stomach
Q. What normally holds the intestines in position within the abdominal cavity?
A. mesentery
B. gravity
C. adipose
D. stomach muscles
Answer- mesentery
Q. What does the pancreatic duct directly join to?
A. jejunum
B. liver
C. ileum
D. duodenum
Answer- duodenum
Q. Which of these does not directly promote the hydrolysis of food?
A. villi
B. microvilli
C. submucosa
D. mucosa
Answer- submucosa
Q. The outer layer of the intestines is the ____
A. mucosa
B. serosa
C. submucosa
D. muscularis
Answer- serosa
Q. Where are the lacteals located?
A. liver
B. pancreas
C. small intestine
D. large intestine
Answer- small intestine
Q. Which structure does the appendix come off of?
A. transverse colon
B. descending colon
C. ascending colon
D. small intestine
Answer- ascending colon
Q. Which vitamin is mainly formed by Escherichia coli?
A. C
B. D
C. B6
D. K
Answer- K
Q. The digestive system functions to provide cells with proper amounts of proteins, carbohydrate or fats.
A. TRUE
B. FALSE
C. Nothing can be said
D. None of the mentioned
Answer- FALSE
Q. The so-called wisdom teeth are actually the four last molars.
A. TRUE
B. FALSE
C. Nothing can be said
D. None of the mentioned
Answer- TRUE
Q. The pyloric sphincter acts to prevent food from leaving the small intestine.
A. TRUE
B. FALSE
C. Nothing can be said
D. None of the mentioned
Answer- FALSE