The hormone _____ is secreted by the cells of the pancreatic islets to increase the amount of glucose in the blood.​ a. ​calcitonin b. ​estrogen c. ​glucagon d. ​insulin

• joccalub:

  Answer: d. insulin

  Actually, there are two hormones secreted by islet cells within the pancreas: insulin and the glucagon.  However, their secretions in response to blood sugar levels, are in opposite fashion!

   

  Insulin is normally secreted by the beta cells of the pancreas while glucagon by the alpha cells. The amount of insulin secreted into the blood increases as the blood glucose rises.  In the same way, as the blood glucose falls, the amount of insulin secreted by the pancreas goes down.

  In glucagon, it is opposite. If blood glucose is high, then there is no glucagon secreted. Therefore, the answer is insulin.

• Phoca:

  Answer:

  The correct answer will be option- D.

  Explanation:

  The Pancreas is a small organ which acts as exocrine as well as an endocrine organ.

  The endocrine nature of pancreas secrets hormone which helps in maintaining the body functions. The β-cells of pancreatic islets or island of the pancreas secrets a hormone called insulin which helps in maintaining the amount of the glucose in the blood.  The insulin helps the body to use the glucose from carbohydrate by binding to the sugar as well as it helps in the storage of the glucose.

  Thus, option- D is the correct answer.