Q: Which hormone is released in response to excess glucose in the blood?  

Answer: A

Insulin hormone is secreted by the pancreas in response to high levels of glucose in the blood. It helps to regulate glucose metabolism by facilitating the uptake of glucose by cells for energy production, and also promotes the storage of excess glucose as glycogen in the liver and muscle tissues. Insulin is thus essential in maintaining normal blood glucose levels and preventing hyperglycemia. In contrast, glucagon hormone is secreted by the pancreas in response to low levels of glucose in the blood, and promotes the breakdown of glycogen to release glucose into the bloodstream, thereby raising blood glucose levels. Thyroxine and oxytocin are not directly involved in the regulation of glucose metabolism.

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