Question

Islets of Langerhans are present in:
A. Brain
B. Stomach
C. Ovary
D. Pancreas

Answer 1

Hint: The Islets of Langerhans are the endocrine in nature. There are three main types of cells present in the Islets of Langerhans: alpha cells, beta cells and delta cells. These cells secrete certain hormones which control the blood sugar levels in the body.

Complete answer:
To know the correct answer to the question, we must be well aware of the Islets of Langerhans.
The endocrine parts of the pancreas are known as the Islets of Langerhans. These are the rounded collection of cells present on the exocrine parts.
These are richly supplied with blood vessels via a dense network of capillaries. The alveoli are separated from each other with the help of a thin layer of reticular tissue.
The three cells of the Islets of Langerhans are:
- Alpha cells – These cells secrete the hormone glucagon. Out of the total cells of the Islets of Langerhans, these form 20% of the cells.
- Beta cells- These hormones secrete the hormone insulin. These form 80% of the total cells of the Islets.
- Delta cells- These produce the hormone gastrin and somatostatin. They occur in very small numbers in the Islets of Langerhans.

Since now we are well aware of the Islets of Langerhans, therefore the correct answer to the question is pancreas.

Note: Here it must be noted that the alpha cells and the delta cells are present in the periphery of the Islets of the Langerhans (the cortex). The beta cells are present on the centre of the Islets (the medulla).