Answer:
The electrical impulse travels from the sinus node to the atrioventricular node (also called AV node). There, impulses are slowed down for a very short period, then continue down the conduction pathway via the bundle of His into the ventricles.
The answer is A: Electron
Because they are loosely bounded and can be easily transferred. The protons are bounded to the nucleus so they cant be transferred.
It cant be an atom or a molecule.
C. Creates energy for cellular use. :)
