Physiology Before the onset of pubey, the GnRH neurons are under the inhibitory control of: A Glycine B Glutamate C Gamma amino butyric acid (GABA) D Beta-endorphin 💡 Explanation Before the onset of pubey, the GnRH neurons are under the inhibitory control of: ✓ Correct Answer: C. Gamma amino butyric acid (GABA)