digestive system secretion study

The secretion in the large intestine consists of which of the following?

bicarbonate- and potassium-rich mucus an alkaline mucus secretion of bicarbonate and potassium protects the large intestinal wall from acids produced by resident bacteria.

Where are the enzymes for digestion of disaccharides and small polypeptides located?

brush border

The breakdown products of which of the following are absorbed into lacteals?

fats

Salivation is controlled almost entirely by the nervous system. Which of the following stimuli would inhibit salivation?

fear fear, sleep, fatigue, and dehydration all inhibit salivation.

Chemical digestion utilizes enzymes in the gastric juice such as gastric lipase digests lipids in the stomach.

gastric lipase stomach. Gastric lipase breakdown the triglycerides.

In the small intestine, which of the following enzymes breaks down oligosaccharides?

glucoamylase

This type of chemical reaction typically occurs as nutrients are digested in the body.

hydrolysis Hydrolysis refers to the enzymatic breakdown of large polymers into monomers while adding the parts of a water molecule to the broken bonds.

This group of enzymes digests the majority of ingested fat.

pancreatic lipases Pancreatic lipases break the bonds between fatty acid chains and glycerol after the fats have been emulsified.

Which of the following digestive processes could be affected by a patient's taking a large amount of antacids?

protein digestion Protein digestion is partially accomplished by pepsin, an enzyme that works best in a pH range of 1.5 to 2.5.

An increase in HCl (hydrochloric acid) arriving in the duodenum would stimulate which hormone that would help to counteract the effects of HCl?

secretin secretin stimulates the duct cells in the pancreas and liver to secrete a bicarbonate-rich solution that will bind hydrogen ions and increase the pH.

In response to a steak dinner, certain secretions are needed to aid digestion. What cells in the pancreas would provide these secretions?

acinar cells in response to a high fat and protein meal, CCK would be stimulated and in turn would stimulate an enzyme-rich secretion from the pancreas.

Chemical digestion utilizes pancreatic enzymes such as pancreatic amylase.

pancreatic amylase.

2. Chemical digestion utilizes pancreatic enzymes such as pancreatic lipase digests lipids in the small intestine.

pancreatic lipase small intestine.

Chemical digestion utilizes enzymes in the gastric juice such as pepsin digests proteins in the stomach

pepsin stomach

Chemical digestion utilizes pancreatic enzymes such as trypsin digests proteins in the small intestine.

trypsin small intestine.

Salivary amylase is a digestive enzyme not featured in the Concept Map. Which of the following describes its function? breaks down complex starches into smaller units, and where in the body does this occur?

Salivary amylase breaks down complex starches into smaller units in the mouth. Salivary amylase in saliva breaks down starch into oligosaccharides.

Which of the following is a source of dietary fiber and promotes timely movement through the colon?

cellulose

HCl secretions convert pepsinogen to the active hormone pepsin. What cells in the gastric pits produce pepsinogen?

chief cells chief cells produce pepsinogen, the inactive form of pepsin.

In what portion of the gastrointestinal tract does most salt and water absorption occur?

small intestine

Amylase breakdown the starch present in food into smaller carbohydrates.

smaller carbohydrates.