Chapter Questions
The correct order of layers in the GI tract from external surface to lumen is _____.a. serosa, muscularis, submucosa, mucosab. mucosa, submucosa, serosa, muscularisc. muscularis, submucosa, mucosa, serosad. submucosa, mucosa, muscularis, serosa
The muscularis of the Gl tract is responsible for _____.a. protecting the lumenb. creating the peristaltic wavec. absorbing water and nutrientsd. allowing the tract to slide around inside the abdominal cavity
The teeth responsible for grinding and crushing are the _____.a. incisorsb. caninesc. premolarsd. All types of teeth grind food.
Immune defenses in the digestive system include all of the following EXCEPT _______.a. MALTb. Peyer's patchesc. liverd. tonsils
The stage of swallowing that involves the rising of the larynx is shown in this figure as _____.a. Ab. B
One function of the organ containing the structures seen below is ____.a. chemical digestion of carbohydratesb. mechanical digestive action of bilec. chemical digestion of proteinsd. nutrient absorption
The organ that is responsible for producing digestive enzymes is the _______.a. liverb. gallbladderc. pancreasd. sublingual salivary gland
Most stomach ulcers are caused by ______.a. stressb. aspirin eroding the mucous lining of the stomachc. alcoholismd. a spiral bacterium
The phase of gastric digestion that is initiated simply by the smell of food is the ________.a. cephalic phaseb. gastric phasec. intestinal phased. All three phases are triggered by the smell of food.
The function of the organ containing the structures shown below is to ________.a. chemically digest foodb. mechanically digest foodc. absorb nutrientsd. All of the above are true of this organ.
The structure shown below is found in the ________ and serves to _______.a. large intestine/decrease surface areab. small intestine/increase surface areac. stomach/produce $\mathrm{HCl}$d. liver/produce and store bile
The most common viral liver disease in the United States is _____>a. hepatitis $\mathrm{A}$ b. hepatitis $\mathrm{B}$c. hepatitis $\mathrm{C}$d. All three are equally uncommon.
The cecum and the vermiform appendix are part of the _____.a. small intestineb. Peyer's patch immune tissuesc. liverd. large intestine
Chemical digestion destroys chemical bonds, creating more surface area for continued digestion.a. Trueb. False
All of the following digestive enzymes function at a pH of 7 except _______.a. pepsinb. trypsinc. amylased. lingual lipase