Adrenalin
True.
Yes.
I ampretty sure you do i am not positive though
insulin
Sympathetic Nerve and adrenalin hormone......
It increases
Increases the heartbeat, the blood flow and expands the veins to accommodate the flow
when the level of oxygen increases in the blood , chemical receptors will inhibit the medulla oblongata
yes because they are tired and exert energy or force..............
Pericarditis
nonsense i dint know the answer
due to catalyst