Pancreas :
- Second largest gland in human body.
- It is yellow in colour.
- It is a heterocrine gland.
- Its exocrine part is formed of large number of lobules or acini(98-99%).
- Each acinus consists of a number of glandular cells which secret the pancreatic juice.
- Its endocrine part is formed of islets of Langerhans(1-2%).
Location -
- leaf shape structure present upon the sides of C-shaped duodenum.
Divided into three parts :
(a) Broad head
(b) Body
(c) Tapering tail
- Pancreas has two ducts :
(i) Duct of wirsung / pancreatic duct -
Pour succus entericus into the first part of small intestine (duodenum) by forming hepatopancreatic duct along with common bile duct.
(ii) Duct of Santorini -
Non functional or accessory duct (help in storing pancreatic juice).
Pancreatic juice -
- Normal volume 1200-1500 ml per day
- pH of the pancreatic juice = 8.2-8.4
- Composition:
(i) Water
(ii) Pancreatic salts(act as buffers)
(iii) Pancreatic enzymes :
(a) Trypsinogen
(b) Chymotrypsinogen
(c) Procarboxypeptidase
(d) Pancreatic amylase / Amylopsin
(e) Pancreatic lipase / steapsin
(f) Nuclease
Q. Protein splitting enzymes present in the pancreatic juice are
(a) Pepsin
(b) Salivary amylase
(c) Chymotrypsin
(d) All of the above
Q. Which of the following proteolytic(protein splitting) enzymes present in the pancreatic juice : (1) pepsin (2) Elastase (3) Salivary amylase (4) Chymotrypsin
(a) 1, 2 and 3 are correct
(b) 1 and 2 are correct
(c) 2 and 4 are correct
(d) 1 and 3 are correct