Final answer:
Growth hormone-inhibiting hormone (GHIH) is secreted when blood sugar is high, serving to inhibit the production of growth hormone (GH) and regulate glucose levels in the body.
Step-by-step explanation:
The growth hormone-inhibiting hormone (GHIH), also known as somatostatin, is secreted when blood sugar is high. GHIH is produced by the hypothalamus to inhibit the production of growth hormone (GH) from the anterior pituitary gland.
When blood glucose levels are elevated, the body needs to regulate these levels, and one of the ways it does so is by releasing GHIH to prevent further increase in blood glucose by inhibiting GH. GH has a diabetogenic effect; therefore, its inhibition helps in controlling the rise in blood glucose levels.