Pancreas. It's the part of the endocrine system that produces insulin. Insulin is the hormone that regulates the amount of sugar in the blood. Hope it helps
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The glands which might be involved in the problem might be either PANCREAS or the ADRENAL gland because of the following reasons;

a) The PANCREAS ---> is the one that regulates blood glucose levels and

b) While the ADRENAL GLANDS ---> is the one that increases blood glucose levels and speeds up the heart rate.

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