Question

The exocrine portion of the pancreas is composed of cells that secrete digestive and HCO3 soln

Answer 1

Answer: The exocrine portion of the pancreas is responsible for producing and secreting digestive enzymes and bicarbonate
`(HCO_3^-)`solution. These secretions play a crucial role in the process of digestion.

Step-by-step explanation:

1. Digestive Enzymes: The exocrine cells of the pancreas produce and release various digestive enzymes. These enzymes include pancreatic amylase, which breaks down carbohydrates; pancreatic lipase, which breaks down fats; and pancreatic proteases, such as trypsin and chymotrypsin, which break down proteins. These enzymes are essential for the breakdown and absorption of nutrients in the small intestine.

2. Bicarbonate Solution
`(HCO_3^-)`: In addition to digestive enzymes, the exocrine cells of the pancreas also secrete a bicarbonate solution. This solution is rich in bicarbonate ions
`(HCO_3^-)` and acts as a buffer to neutralize the acidic contents of the stomach that enter the small intestine. The bicarbonate solution helps maintain an optimal pH for the activity of digestive enzymes and protects the lining of the small intestine from damage.

To summarize, the exocrine portion of the pancreas is made up of cells that produce and secrete digestive enzymes and bicarbonate solution. These secretions aid in the breakdown of carbohydrates, fats, and proteins during digestion and help maintain a suitable pH environment for efficient digestion in the small intestine.