The alimentary canal extends, in its entirety, from
A. the mouth to the large intestine.
B. the stomach to the small intestine.
C. the liver to the gallbladder. D. the mouth to the anus - ANS D
The digestive system
A. ingests food, propels food, mechanically and chemically breaks...
The alimentary canal extends, in its entirety, from
A. the mouth to the large intestine.
B. the stomach to the small intestine.
C. the liver to the gallbladder. D. the mouth to the anus - ANS D
The digestive system
A. ingests food, propels food, mechanically and chemically breaks down food, absorbs
nutrients, and defecates the remainder.
B. mechanically and chemically assembles food from absorbed nutrients.
C. sends cellular debris to lysosomes.
D. absorbs nutrients in the mouth, pharynx, esophagus and stomach, and releases nutrients in
the intestines. - ANS A
The correct sequence for the layers in the walls of the alimentary canal from innermost to
outermost is the
A. mucosa, muscular layer, serosa, submucosa.
B. mucosa, submucosa, muscular layer, serosa.
C. serosa, muscular layer, mucosa, submucosa. D. submucosa, mucosa, serosa, muscular
layer. - ANS B
The _______ is the layer of the alimentary canal that absorbs nutrients.
A. mucosa
B. submucosa
C. muscular layer
D. serosa - ANS A
Peristalsis occurs in the digestive tract
A. from the pharynx to the anus. B. in the stomach and small intestine only.
C. in the small and large intestines only.
D. in the stomach, small intestine, and large intestine. - ANS A
Activities of the digestive system generally increase when it is stimulated by A. sympathetic
impulses. B. parasympathetic impulses. C. sensory impulses.
D. somatic impulses. - ANS B
The teeth that are best adapted for biting off hunks of food are the
A. incisors.
B. canines.
,C. bicuspids.
D. molars. - ANS A
The root canal of a tooth contains
A. dentin.
B. cementum.
C. gingiva.
D. blood vessels and nerves. - ANS D
The mechanical breakup of food particles in the mouth is called
A. mastication.
B. salivation.
C. peristalsis.
D. absorption. - ANS A
The uvula is
A. a type of tooth.
B. a projection from the soft palate.
C. a flap of tissue that keeps food from entering the trachea. D. part of the tongue. - ANS B
Because of their location, swollen palatine tonsils may interfere with
A. breathing.
B. swallowing.
C. both breathing and swallowing.
D. neither breathing nor swallowing. - ANS C
Salivary amylase digests A. carbohydrates.
B. proteins.
C. fats.
D. vitamins. - ANS A
The functions of saliva include A.
moistening, binding, and building up food particles; beginning chemical digestion of
carbohydrates; and cleansing the esophagus.
B.
moistening, binding, and dissolving food particles; beginning chemical digestion of proteins; and
cleansing the esophagus.
C.
moistening, binding, and building up food particles; beginning mechanical digestion of fats; and
cleansing the teeth and mouth.
D.
moistening, binding, and dissolving food particles; beginning chemical digestion of
carbohydrates; and cleansing the teeth and mouth. - ANS D
, . The parotid glands are
A. the largest salivary glands. B. the smallest salivary glands. C. under the tongue.
D. in the lower jaw. - ANS A
In the swallowing reflex,
A. muscles pull the pharynx upward toward the food.
B. the epiglottis closes off the top of the trachea.
C. the tongue presses against the uvula and soft palate.
D. all of the above. - ANS D
The epiglottis is attached to the A. esophagus.
B. trachea.
C. pharynx.
D. larynx. - ANS D
Edith suffers from severe heartburn. She goes to her physician and is diagnosed with a hiatal
hernia. This condition affects her
A. abdominal wall.
B. small intestine.
C. diaphragm.
D. stomach wall. - ANS C
Heartburn is usually caused by the effects of gastric juice on the
A. heart.
B. esophagus.
C. stomach.
D. small intestine - ANS B
Elliot thought that his peptic ulcers were caused by his nagging parents, and was surprised
when the doctor handed him a prescription for medication to treat
A. a bacterial infection.
B. a viral infection.
C. a too high pH.
D. excess bile. - ANS A
The main part of the stomach is called the
A. fundus.
B. pylorus.
C. cardia.
D. body. - ANS D
It is good that Emily does not remember being a newborn, because she was miserable, vomiting
frequently. An X-ray revealed hypertrophic pyloric stenosis. The problem in Emily's digestive
system, before surgery helped her, was
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