AP 233 Digest Lecture Quiz
Increased activity of the parietal cells will result in
?
The absorption of amino acids in the small intestine involves
?
Absorption of glucose from the gut lumen depends on
A B C
During glycolysis
A and B only
Enzymes secreted by the pancreas
A and B only
Enzymes secreted by the pancreas include
A and B only
In the electron transport chain
A and C only
Absorption of glucose from the gut lumen depends on
A, B, C
Tony is a chronic alcoholic with cirrhosis of the liver, a condition in which liver cells die and are replaced by connective tissue. Which of the following signs would you expect to observe in Tony?
All of the above
Which of the following is not a protective feature of the gastric mucosa
All of the above are
Which vitamin requires intrinsic factor in order to be absorbed
B12
Several digestive enzymes are secreted as zymogens because
they act only in the lumen and do not digest intracellular proteins
Several digestive enzymes are secreted as zymogens because __________.
they act only in the lumen and do not digest intracellular proteins
Ketosis results from
utilizing fatty acids as a primary energy source
Which organ is not part of the gastrointestinal tract
Liver
During glycolysis
NAD+ is reduced
Which of the following enzymes functions at the lowest pH
Pepsin
Adult humans have the dental formula 2 1 2 3. The second 2 is
Premolars
Which of the following is not normally found in saliva
Protease
The Kreb's cycle
begins with the formation of a molecule of citric acid
Each of the following is a function of the liver, except
bicarbonate production
Digestion of carbohydrates within the small intestine involves enzymes that come from
c, d
Lacteals
carry absorbed fats to the lymphatic system
Pepsinogen is produced by ___ and is activated by ____ which is secreted by _____
chief cells; hydrochloric acid; parietal cells
Transport of lipid soluble nutrients throughout the body rely on
chylomicrons moving into the lacteals
Most of the NADH is provided in
citric acid cycle
Glycolysis is best defined as the
conversion of glucose into two molecules of pyruvic acid
Liver damage would most affect the digestion of
lipids
Soluble fiber is a part of a healthy diet because
lowers blood cholesterol levels
Parietal cells secrete
more than one of the above
Segmentation is
more than one of the above
The carbon dioxide of respiration is formed during
more than one of the above
The presence of fatty acids in the small intestine stimulate enteroendocrine cells to release
more than one of the above
Carbohydrate digestion begins in the _____, whereas protein begins in the
mouth; stomach
Food is prevented from entering the nasal cavity by
none of the above
Late one night, while studying for your anatomy class, you open a box of saltine crackers to do a little snacking. After chewing on a starchy morsel for a few minutes, you begin to notice a sweet taste in your mouth. What accounts for this?
none of the above
Mass movements are
none of the above
The organ that produces enzymes capable of digesting all the macromolecule classes is the
pancreas
Identify the salivary gland that secretes a watery mixture rich in salivary amylase....
parotid
Which of the following is not a function of the liver?
produce bicarbonate
Which of the following nutrients must be digested in order to be absorbed
proteins
Acetyl CoA is formed during
pyruvate oxidation
Gastric secretion leads to all of the following except
relaxation of the cardiac sphincter
The vitamin that is part of the coenzymes FAD and FMN is
riboflavin
In response to the hormone cholecystokinin, the pancreas secretes a fluid
rich in enzymes
Chemical digestion protein is initiated in the
stomach
If digestion of a carbohydrate results in equal amounts of glucose and fructose, this carbohydrate is probably
sucrose
The muscle tone of the __________ along the colon contracts it lengthwise, causing its walls to bulge and form pouches called __________.
taeniae coli; haustra
Pancreatic enzymes are secreted in response to a hormone called
CCK
The presence of fatty chyme in the small intestine stimulates it to release _______, which causes the _____.
CCK; gallbladder to release bile
Of the five types of secretory cells in the gastric glands, which ones secrete pepsinogen
Chief cells
Which of the following is not a function of gastric hydrochloric acid
Emulsify lipids
Lipase digests
Triglycerides
Which of the following nutrients is absorbed by the lacteals of the small intestine?
Triglycerides
Functions of the stomach include all of the following except
absorption of dipeptides
Which of the following is not a function of saliva
digestion of maltose
Due to a lack of carbonic anhydrase in her parietal cells, Renee produces very little HCl in the stomach, this would most effect the absorption of ____________ in the small intestine.
dipeptides
Lactose intolerant individuals cannot digest the ____ lactose because they lack the enzyme ____.
disaccharide; lactase
Necessary for Vitamin B12 absorption, __________ is/are secreted by __________ cells.
intrinsic factor; parietal
If digestion of a carbohydrate results in equal amounts of glucose and galactose, this carb is probably
lactose
glucose and galactose
lactose
The three most abundant classes of nutrients are
fats, proteins, and carbohydrates
Assume an individual has no sodium in their intestinal tract. If this were the case the asorption of _____ would be most affected
galactose
Bile is stored in the
gallbladder
The presence of food in the stomach increases the pH and triggers the release of a hormone that stimulates contraction of the gastric smooth muscle and....... Specifically these events involve release of
gastrin in the gastric phase of digestion
Glucose is stored as the carbohydrate
glycogen
Argentiffin cells of the stomach release:
histamine
The acid secretions from an ulcer in the stomach damaging the underlying connective tissue will lead to increased ___ production
hydrochloric acid
Most amino acids are absorbed via
secondary active symport
The absorption of dipeptides in the small intestine involves
secondary active symport with H+
A sodium bicarbonate solution is secreted in response to a hormone called
secretin
An intestinal hormone that leads to the release of bicarbonate ions from the pancreas and decreases production of HCl and pepsinogen in the stomach is
secretin
The lining of the gastrointestinal tract that allows for absorption and secretion is
simple columnar epithilium
Amino acids and monosaccharides are absorbed in the __________, and fatty acids are absorbed in the __________.
small intestine; small intestine
Amylase from saliva digests
starch