Respuesta :
Involuntary and the brain, because the stem controls involuntary reactions
Answer:
Involuntary, brain
Explanation:
Involuntary functions are not within our control such as heart beat, digestion of food, breathing and more.
All involuntary actions are controlled by the medulla oblongata which is located in the brain stem.
On the other hand all voluntary actions performed by the skeletal muscle is controlled by the somatic nervous system.