What triggers emotional crying in humans?

Answer: Brain signals stimulate tear glands

Brain signals stimulate tear glands ✓ — Correct! Emotional crying follows a neural pathway: the limbic system (which processes emotions) sends signals to the lacrimal nucleus in the brainstem. Parasympathetic nerve impulses then travel to the lacrimal glands, stimulating tear production. This is how strong emotions—sadness, joy, frustration—can trigger tears automatically.

Eyes need cleaning when upset — Wrong. Cleaning is what reflex tears do (blinking spreads them). Emotional tears come from neural signals—your limbic system tells your tear glands to produce tears through the parasympathetic nervous system.

Body temperature rises too high — Wrong. Body temperature doesn't trigger crying. Emotional tears result from brain signals traveling from the limbic system through the brainstem to stimulate the lacrimal glands.