Pancreatic enzymes are secreted in response to a hormone called A. E. gastrin 60
ID: 3484174 • Letter: P
Question
Pancreatic enzymes are secreted in response to a hormone called A. E. gastrin 60) Which of the following is not a component of the pancreatic juice? A. Trypsinogen D. Sodium bicarbonate E. Enterokinase B. Chymotrypsinogen C. Deoxyribonuclease 61) Contact digestion takes place in/at the A. gastric pits D. brush border of the small intestine B. surface of the gastric mucosa C. intestinal crypts E. cytoplasm in the cells of the small intestine 62) Carbohydrate digestion begins in the , whereas protein digestion begins in the A. liver, small intestine C. mouth; stomach B. small intestine; stomach E. stomach; small intestine D. mouth; small intestine 63) The enzyme(s) called A. lactase; glucose D. lactose; lactase break(s) down the substrate called B. peptidases; proteins C. lipases; micelles 64) Which of the following statements is true regarding the sodium-glucose transport protein (SGLP)? A. It is a uniport carrier. C. It uses solvent drag to transport glucose and sodium. D. It transports glucose and sodium from the intestinal lumen into the epithelial cells E. It transports glucose from the intestinal lumen into the epithelial cell, and sodium in the opposite direction. B. It is an antiport carrier. 65) Amino acids and monosaccharides are absorbed in the absorbed in the A. small intestine; large intestine C. stomach; small intestine E. small intestine; small intestine and fatty acids are B. small intestine; liver D. stomach; large intestine 66) Which of the following is the proper sequence by which proteins are digested by different enzymes? A. Pepsin, trypsin, carboxypeptidase, dipeptidase B. Pepsin, trypsin, dipeptidase, carboxypeptidase C. Trypsin, pepsin, carboxypeptidase, dipeptidase D. Trypsin, pepsin, dipeptidase, carboxypeptidase E. Dipeptidase, carboxypeptidase, pepsin, trypsinExplanation / Answer
59.
Cholecystokinin is a peptide hormone produced by enteroendocrine cells of duodenum, the first part of small intestines. The release of cholecystokinin induces the release of digestive enzymes by pancreas to carryout the digestion of proteins. This hormone also induces the bile release from gall bladder to carryout emulsification of fats. Cholecycstokinin hormone is previously known with the name of pancreozymin. The option B is correct. Endocrine part of pancreas produces insulin and glucagon hormones that regulate the blood glucose levels. Secretin and gastrin are produced by stomach.
60.
The pancreatic juice is composed of proteases that digest proteins, lipases that digest fats, nucleases that digest the nucleic acids and sodium bicarbonate to increase the pH during digestion. Enterokinase is produced by the small intestines and is not component of pancreatic juice. option E is correct.
61.
During digestion in small intestines, the enterocytes in the brush border of intestinal epithelium increase the surface area for digestion to takes place and carry the components of digestion. The brush border releases the enzymes to accomplish the digestion and this mechanism is known as contact digestion. Option D is correct.
62.
The digestion of carbohydrates begins in mouth and is accomplished by salivary amylase enzyme. The digestion of proteins is initiated by stomach proteases. Thus, carbohydrates digestion starts in mouth and protein digestion starts in stomach. option C is correct.
63.
Peptidases and proteases are enzymes that hydrolyze the substrates called proteins. The proteins are broken down to short peptides and then further into monomeric forms called amino acids. Option B is correct.
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