Answer:
The salivary glands are monitored by the autonomic nervous system. The smell, sight, or taste of the food instigates the discharging of saliva from the salivary glands. Thus, if an unappealing food is put in the mouth, the sympathetic nervous system gets stimulated and the discharging of saliva ceases. This demonstrates that the monitoring of digestive enzyme secretion from the salivary glands is not voluntary and is controlled by autonomic nervous system.
