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Digestive Glands - Pancreas and Pancreatic Juice

Pancreas is soft, lobulated, grayish pink gland present posterior to the stomach in the abdominal cavity. It weighs about 60gms and is about 2.5 cm wide and 12 to 15 cm long. Ithas three parts head, body and tail. The head lies in the curve of the duodenum, body behind the stomach and tail reaches the spleen lying in front of the left kidney. Pancreas has got two types of functions the endocrinal and exocrinal functions.

Endocrine part; is formed by islets of Langerhans, the beta cells secrete insulin and alpha cells secrete glucagon. Deficiency of insulin causes diabetes… (635 more words) …

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Hormones of GIT

GI hormones play a major role in the regulation of GI secretion and motility. These hormones are classified in two groups

  • Gastrin family it includes

    • Gastrin

    • Cholecystokinin

  • Secretin family includes

    • Secretin

    • Somatostatin

    • Glucagon

    • Vasoactive intestinal Peptide

    • Gastric Inhibitory Polypeptide

Gastrin:

Secretion; Gastrin is a polypeptide hormone found in the various forms. G 17 is the principal form. It is produced by

  • G cells present in the pyloric glands. The glands are present in the antral part of the gastric mucosa.

  • It is found in the pancreatic islets in fetal life. Gastrin-secreting tumours, gastrinomas can occur in the pancreas of… (261 more words) …

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