Exam 4 Flashcards
Which of the following is not part of the alimentary canal?
Pancreas
Enzymatic digestion of food occurs in each of the following except…
The large intestine
The movement of digested food into the blood or lymph is…
Absorption
The release of digestive enzymes, bile, buffers, and mucus is a digestive process referred to as…
Secretion
Wavelike muscular contraction of the gastrointestinal tract is called…
Peristalsis
Which of the following motility processes is NOT correctly matched to its description?
Mastication- removal of waste
Each of the following is a function of the oral cavity except one. Which one is not?
Partial chemical digestion of proteins
The tongue produces and releases an enzyme that partially digest…
Lipids
Each of the three salivary glands has a different cellular composition… Producing either serous (watery) secretions, mucus secretions, or a combination of both. Which produces both serous AND mucus secretions?
Submandibular glands
Which carbohydrase is secreted by two of the three pairs of salivary glands and starts the chemical digestion of starch?
Amylase
Which phase of deglutition is completely controlled by the autonomic nervous system?
Esophageal phase
Food passes through the esophageal sphincter into the_____ region of the stomach.
Cardiac
Which of the following is NOT a function of the stomach?
Digestion of carbohydrates
Stomach has inward folds of its lining called______ which expand to help store food.
Rugae
_______is required for the intestinal absorption of vitamin B12 and is produced by_____ in the stomach.
Intrinsic factor, parietal cells
G-cells
Secrete gastrin
Parietal cells
Secrete HCl (hydrochloric acid)
D-cells
Secrete somatostatin
Enterochromaffin-like cells
Secrete histamine
Chief cells
Secrete pepsinogen
Parietal cells
Secrete intrinsic factor
The release of secretions by parietal cells and chief cells is stimulated by the hormone…
Gastrin
Antihistamines would limit the gastric secretion of…
Hydrochloric acid
Rennin and gastric lipase are enzymes produced by gastric glands in the stomach for what purpose?
To break down nutrients in milk when we are infants
Acidic chyme in the duodenum is buffered by______ secreted from the pancreas.
Bicarbonate
Pepsin would have the greatest activity…
When the pH of the chyme is less than 3
Products like Tagamet and Zantac treat heartburn and acid reflux by…
Blocking hydrogen receptors in the stomach’s parietal cells
Which of the following triggers the cephalic phase of gastric activity?
The thought of food
What hormone targets the liver and stimulates the production of bile?
Secretin
Cholecystokinin (CCK) is secreted by the_______ in response to the presence of lipids and carbohydrates in the small intestine.
Small intestine
Along with cholecystokinin (CCK), gastric inhibitory peptide (GIP) functions to…
All of the above
a-inhibit parietal secretions in the stomach
b-inhibit peristaltic activities in the stomach
c-inhibit chief sales secretions in the stomach
The negative feedback control of HCI secretion in the gastric phase of gastric regulation is mainly by…
Both a decrease in gastrin and increase in somatostatin secretion
All of the following hormones are secreted by the small intestine except…
Gastrin
Salivary amylase is partially digests______ by breaking it down into ________molecules.
Starch, maltose