Question 12

Glucagon is secreted by the organ represented by this image.

The organ depicted is responsible for the secretion of glucagon, a hormone that plays a crucial role in glucose metabolism by raising blood sugar levels. This function is vital for maintaining homeostasis in the body.

A) Bicarbonate

Bicarbonate is primarily produced by the pancreas, but it serves mainly to neutralize stomach acid in the small intestine rather than functioning as a hormone. Thus, it is not the correct answer in the context of endocrine secretion.

B) Glucagon

Glucagon is a hormone secreted by the alpha cells of the pancreas. It is integral to regulating blood glucose levels, especially during fasting, by promoting the conversion of glycogen to glucose in the liver. This makes glucagon the correct answer regarding the endocrine function of the organ.

C) Lipase

Lipase is an enzyme that helps in the digestion of fats and is secreted by the pancreas as well, but it is not an endocrine function. Instead, it is part of the exocrine function, which involves digestive enzymes, making this option incorrect.

D) Amylase

Amylase is another digestive enzyme produced by the pancreas, specifically responsible for breaking down carbohydrates. Like lipase, it is part of the exocrine functions of the pancreas and does not pertain to the endocrine secretion of hormones, rendering this option incorrect.

Conclusion

Glucagon is the sole hormone among the options that is secreted by the pancreas' endocrine function, making it the correct answer. The other options either represent digestive enzymes or substances that do not align with the endocrine role of hormone secretion, confirming that glucagon is the most relevant and accurate choice.