BIO 142 DIGESTIVE SYSTEM: TEST QUESTIONS WITH
COMPLETE SOLUTIONS
1) Lipid molecules that are absorbed from the GI tract enter
A. mesenteric arteries.
B. mesenteric veins.
C. lymphatic capillaries.
D. the liver. -- Correct Answer ✔✔ C. lymphatic capillaries.
2) A sphincter is a
A. thickening of the longitudinal layer of the muscularis that propels materials
through the GI tract.
B. thickening of the circular layer of the muscularis that controls movement of
materials through the GI tract.
C. fold of the mucosa of the GI tract that increases the total surface area for
absorption of nutrients.
D. circle of adventitia that anchors the GI tract to neighboring structures. --
Correct Answer ✔✔ B. thickening of the circular layer of the muscularis that
controls movement of materials through the GI
3) The type of receptor within the GI tract wall that detects stretch is the
, A. steroid receptor.
B. chemoreceptor.
C. mechanoreceptor.
D. retroperitoneal proprioceptor. -- Correct Answer ✔✔ C. mechanoreceptor.
4) Mechanoreceptors and chemoreceptors are found in the
A. adventitia of the upper portion of the GI tract.
B. epithelium of the inferior portion of the GI tract.
C. mucosa and submucosa of the GI tract along its length.
D. myenteric plexus of the mucosa of the intestine.
E. muscularis interna of the entire length of the GI tract. -- Correct Answer ✔✔
C. mucosa and submucosa of the GI tract along its length.
5) If a fatty meal has been ingested, the liver and gallbladder need to be alerted about
the need for bile. The receptors that are responsible for sensing the fat in the
ingested food are referred to as
A. bilireceptors.
B. mechanoreceptors.
C. chemoreceptors.
D. omental neurons
E. osmodetectors. -- Correct Answer ✔✔ C. chemoreceptors.
6) In some digestive reflexes, the facial nerve stimulates salivary glands; the salivary
glands are acting as
A. afferents.
B. receptors.
, C. efferents.
D. effectors.
E. control centers. -- Correct Answer ✔✔ D. effectors.
7) Secretin is a hormone that is secreted by the
A. stomach.
B. small intestine.
C. large intestine.
D. liver.
E. pancreas. -- Correct Answer ✔✔ B. small intestine.
8) Cholecystokinin is a(n) _________ released by the _________.
A. enzyme; stomach
B. enzyme; small intestine
C. enzyme; gallbladder
D. hormone; small intestine
E. hormone; gallbladder -- Correct Answer ✔✔ D. hormone; small intestine
9) Which of the following is considered to be one of the primary digestive system
hormones?
A. Bile
B. Gastrin
C. Hydrochloric acid
D. Pancreatic amylase -- Correct Answer ✔✔ B. Gastrin
10) An enzyme found within saliva is salivary
COMPLETE SOLUTIONS
1) Lipid molecules that are absorbed from the GI tract enter
A. mesenteric arteries.
B. mesenteric veins.
C. lymphatic capillaries.
D. the liver. -- Correct Answer ✔✔ C. lymphatic capillaries.
2) A sphincter is a
A. thickening of the longitudinal layer of the muscularis that propels materials
through the GI tract.
B. thickening of the circular layer of the muscularis that controls movement of
materials through the GI tract.
C. fold of the mucosa of the GI tract that increases the total surface area for
absorption of nutrients.
D. circle of adventitia that anchors the GI tract to neighboring structures. --
Correct Answer ✔✔ B. thickening of the circular layer of the muscularis that
controls movement of materials through the GI
3) The type of receptor within the GI tract wall that detects stretch is the
, A. steroid receptor.
B. chemoreceptor.
C. mechanoreceptor.
D. retroperitoneal proprioceptor. -- Correct Answer ✔✔ C. mechanoreceptor.
4) Mechanoreceptors and chemoreceptors are found in the
A. adventitia of the upper portion of the GI tract.
B. epithelium of the inferior portion of the GI tract.
C. mucosa and submucosa of the GI tract along its length.
D. myenteric plexus of the mucosa of the intestine.
E. muscularis interna of the entire length of the GI tract. -- Correct Answer ✔✔
C. mucosa and submucosa of the GI tract along its length.
5) If a fatty meal has been ingested, the liver and gallbladder need to be alerted about
the need for bile. The receptors that are responsible for sensing the fat in the
ingested food are referred to as
A. bilireceptors.
B. mechanoreceptors.
C. chemoreceptors.
D. omental neurons
E. osmodetectors. -- Correct Answer ✔✔ C. chemoreceptors.
6) In some digestive reflexes, the facial nerve stimulates salivary glands; the salivary
glands are acting as
A. afferents.
B. receptors.
, C. efferents.
D. effectors.
E. control centers. -- Correct Answer ✔✔ D. effectors.
7) Secretin is a hormone that is secreted by the
A. stomach.
B. small intestine.
C. large intestine.
D. liver.
E. pancreas. -- Correct Answer ✔✔ B. small intestine.
8) Cholecystokinin is a(n) _________ released by the _________.
A. enzyme; stomach
B. enzyme; small intestine
C. enzyme; gallbladder
D. hormone; small intestine
E. hormone; gallbladder -- Correct Answer ✔✔ D. hormone; small intestine
9) Which of the following is considered to be one of the primary digestive system
hormones?
A. Bile
B. Gastrin
C. Hydrochloric acid
D. Pancreatic amylase -- Correct Answer ✔✔ B. Gastrin
10) An enzyme found within saliva is salivary
