BIO 104L LAB MANUAL
BIO 104L LAB MANUAL
12th Edition
ISBN: 9781307126853
Author: Mader
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 40, Problem 1NS.1QC
Summary Introduction

To determine:

The type of disease or symptoms occur after a ligating the pancreatic duct of dogs.

Introduction:

Pancreas is a gland found in the upper abdomen. Pancreas is consisting of both endocrine and exocrine tissues. It serves as digestive exocrine gland and hormone releasing endocrine gland.

Expert Solution & Answer
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Explanation of Solution

There are two types of glandular systems: The endocrine glands and exocrine glands. The glands of the endocrine system release their content directly into the blood circulation and regulate other organs of the body. They have no ducts. Thus, called as the ductless glands. The glands of exocrine system release their content into ducts that move the content to the target tissue. Their secretion is carried to the lumen of other organs or to the body’s surface.

Pancreas act as both exocrine and endocrine system. Pancreas secretes digestive juice through pancreatic duct, so it acts as exocrine gland. It also secretes the hormone like insulin and glucagon directly into the blood, so it acts as an endocrine gland. The ligation of pancreatic duct causes the degeneration of those cells that secrete digestive juice.

The ligation only damages the exocrine tissue, and leaves the endocrine organ intact. The symptoms that occur due to the ligation of the pancreatic duct are: gastritis, acidity and ulcers. Also, the animal is not being able to digest their food because of the degeneration of exocrine tissue (pancreatic duct) which secretes digestive juice.

Conclusion

The symptoms that occur after the ligation of pancreatic duct are: gastritis, acidity and ulcer.

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