Hormone levels are controlled by a mechanism known as a(n) _______ ________, which can be either negative or positive.

Feedback Mechanism

A process by which a system regulates itself by monitoring its own output or response to external stimuli and making adjustments accordingly.

Negative

A term often used to describe the absence of something, such as disease in medical tests, or expressing a denial or refusal.

Positive

Characterized by the presence rather than absence of distinguishing features.