Discussion
If brain death occurs, a person still remains alive in this condition because :
Answer: C
The answer is the autonomic processes are governed by the brain stem.
Breathing, heartbeat, blood pressure and other vital autonomic functions are controlled by centres in the brain stem, chiefly the medulla oblongata and pons. When the higher brain, the cerebral cortex, stops functioning but the brain stem still works, as in a persistent vegetative state, the body continues to breathe and the heart continues to beat, so the person remains alive in a biological sense.
The cortex governs thought, sensation and voluntary action, not autonomic functions, and 'autoplasia' and 'neuroplasia' are not mechanisms that sustain life. (Strictly, if the brain stem itself dies, as in whole-brain death, the body survives only on a ventilator.)
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