explain how hormone secretion is regulated?

Answer:
Limiting to the Anterior Pituitary Hormones, Negative Feedback.

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The pituitary gland controls hormone secretions in the human body.

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The question is broader than I want to try and answer directly. Allow me to suggest some reading:

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Pituitary is wrongly called the master gland
Its the hypothalamus that controls all hormonal secretions even those of the pituitary. If 'more-than-enough' hormones are secreted, the negative feedback loop occurs. Its nothing- H will sense that too much hormone is there and will send the signal to the appropriate gland 2 stop its secretion.

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