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