Final answer:
The name of the cycle is negative feedback loop.
Step-by-step explanation:
The name of the cycle where an endocrine gland releases a hormone that stimulates a target organ to send a message back to the endocrine gland to reduce secretion of a hormone is called the negative feedback loop.
In this cycle, the hormone released by the endocrine gland acts on the target organ to elicit a response. Once the response reaches a certain level, it sends a signal back to the endocrine gland to inhibit further secretion of the hormone.
This negative feedback mechanism helps maintain the concentration of hormones in the blood within a narrow range, ensuring homeostasis in the body.