Given below is the outline of the human body showing the important glands: Given below is the outline of the human body showing the important glands:
Name the endocrine part of the part numbered 3.
Topic: Islets of Langerhans
Answer
The ISLETS OF LANGERHANS.
The question says the ENDOCRINE PART, which is the clue: the PANCREAS is a HETEROCRINE (mixed) gland, doing two quite different jobs through two different tissues. the EXOCRINE part pours pancreatic juice with its digestive enzymes into the duodenum through a DUCT the ENDOCRINE part — the ISLETS OF LANGERHANS — releases hormones DIRECTLY INTO THE BLOOD, with no duct at all
The word ISLETS (little islands) describes the arrangement exactly: isolated patches of hormone-secreting cells embedded among the far more numerous enzyme-secreting cells.
Within them: BETA cells secrete INSULIN (lowers blood glucose), ALPHA cells secrete GLUCAGON (raises it). The pancreas is the standard answer whenever a question asks for a mixed gland.