The role of acetylcholine in the digestive tract is to _________, while the role of norepinephrine is to ______.
A. stimulate, stimulate
B. stimulate, inhibit
C. inhibit, inhibit
D. inhibit, stimulate
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Question 2) What disease is caused by the absence of enteric neurons in the distal large intestine?
A. Hirschprung disease
B. multiple endocrine neoplasia type 2
C. spastic colon
D. gastroenteritis
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Question 3) What is the function of interstitial cells of the myenteric plexus?
A. chemoreceptors that detect the chemical composition of food
B. production of mucus for lubrication and protection
C. pacemaker cells that promote rhythmic contractions of the smooth muscle
D. release of enzymes for chemical digestion
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Question 4) Parasympathetic nerves extend to the digestive tract through the ____________ nerve.
A. gastric
B. cardiac
C. vagus
D. accessory
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Question 5) What is the function of enteric sensory neurons?
A. detect changes in chemical composition of digestive tract contents
B. stimulate or inhibit smooth muscle contraction in the digestive tract
C. stimulate or inhibit glandular secretion in the digestive tract
D. detect stretch of the digestive tract wall
E. detect changes in chemical composition of digestive tract contents and detect stretch of the digestive tract wall
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Question 6) Secretions that are added as food moves through the GI tract assist in
A. liquefying and digesting the food.
B. vitamin A and D production and storage.
C. distribution of nutrients throughout the body.
D. insulin production.
E. bile production.
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Question 7) The enteric nervous system acts independently of the CNS to control local reflexes in the digestive tract.
Indicate whether the statement is true or false.
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Question 8) Beginning at the lumen, the sequence of layers of the digestive tract wall is
A. submucosa, mucosa, serous membrane, muscularis.
B. muscularis, lamina propria, submucosa, mucosa.
C. mucosa, submucosa, muscularis, serosa.
D. peritoneum, submucosa, mucosa, lamina propria.
E. submucosa, mucosa, adventitia, muscularis.
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Question 9) Which layer of the digestive tract is in direct contact with the food consumed?
A. mucosa
B. muscularis
C. submucosa
D. serosa
E. peritoneum
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Question 10) The myenteric plexus is found in the _____ of the digestive tract wall.
A. mucosa
B. serosa
C. submucosa
D. muscularis
E. adventitia
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