Final answer:
Adipose tissues release leptin after a meal, which helps regulate energy balance and is essential for reproductive health, but its release requires sufficient body fat.
Step-by-step explanation:
After a meal, adipose tissues release the hormone leptin. Leptin plays a role in regulating energy balance by inhibiting hunger, which in turn diminishes fat storage in adipocytes. It has a crucial function in reproductive health as well, as it is necessary for the production of gonadotropin-releasing hormone and gonadotropin, which are vital in producing estrogens and progesterone. However, leptin can only be released when there is sufficient body fat present.
It's important to note that while pancreatic insulin is secreted in response to elevated blood glucose levels, with the purpose of reducing glucose in the blood by promoting its storage as glycogen in the liver, insulin is not a hormone released by adipose tissue.