This is because that our subconscious mechanisms have control of this involuntary system.

这是因为我们的潜意识机能控制了这个不自觉的系统。

youdao

Obama Care moves us from a system of voluntary to involuntary health uninsurance, and it is the thirty million uninsured who probably need it the most.

FORBES: Government Study Finds Obama Care Leaves Thirty Million Uninsured

Sleep deprivation also led to an increase in the activity of the sympathetic nervous system, which controls many of the body's "involuntary" functions.

BBC: Lack of sleep may speed ageing process