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