Question

thyroid gland secretes it's hormones when they receive instructions from_gland through its hormones​

Answer 1

Answer:

Thyroxine is the main hormone secreted into the bloodstream by the thyroid gland. It is the inactive form and most of it is converted to an active form called triiodothyronine by organs such as the liver and kidneys.

Answer 2

Answer:

Here is your answer:Pituitary gland.