Suppose that hormone A binds to intracellular receptors in its target tissue. Also suppose that as a result of hormone A, the target tissue is now sensitive to or responsive to hormone B. What was the action of hormone A?
Oxytocin is a hormone that is involved with increasing contractions during childbirth. The action is binding to membrane receptors and the result is increasing sodium and calcium. What is oxytocin most likely to be in structure?
Suppose that the anterior pituitary secretes more ACTH, leading to more glucocorticoids in plasma, which causes the anterior pituitary to then secrete less ACTH. What is this type of hormonal control an example of?