Which of the following hormones is secreted by the Beta cell of Islet of Langerhans of Pancreas?

The Islets of Langerhans are the endocrine clusters within the pancreas. They consist of several types of cells, each secreting a specific hormone:

• Beta cells: These make up the majority of the islet cells and secrete Insulin, which lowers blood glucose levels by facilitating glucose uptake into cells.
• Alpha cells: These secrete Glucagon (noted as Glucagan in the options), which raises blood glucose levels by stimulating the liver to convert glycogen to glucose.
• Aldosterone: This is a mineralocorticoid hormone produced by the adrenal cortex, which helps regulate salt and water balance.
• Adrenalin: Also known as epinephrine, it is produced by the adrenal medulla and is involved in the 'fight or flight' response.

Thus, Insulin is the hormone secreted by the Beta cells.