Both "turn on" factors (hormonal, humoral, and neural stimuli) and "turn off" factors (feedback inhibition and others) may be modulated by the activity of the nervous system. T/F

True.

Explanation:

Nervous system is one of the most important systems of the body that regulate the control and coordination of the body. Nerve cells are the basic structural unit of the nervous system.

The turn on factors like hormonal, neural stimuli can be modulated by the activity of the nervous system. The turn off factors like feedback inhibition can be controlled or altered by the nervous system.

Thus, the answer is true.