Question

Professor jenson is explaining to his class that mental disorders are sometimes related to abnormal hormonal activity in the _____ system of the body.

Answer 1

I believe the answer is: Endocrine system

The endocrine system in our body Regulates the substances in our body which would influence the overall mood that we feel at that particular moment.
Hypersecretion of hormones that made by the endocrine system would make someone experience psychological instability.