Which of the following does NOT happen when your muscles are fatigued? A. lactic acid buildup causes an increase in ATP production
B. oxygen to the muscles decreases
C. recovery period 'pays back' the oxygen debt
D. ATP production decreases

Gotta have a picture ^^

In atoms, the electron carries a negative elementary or unit charge; the proton carries a positive charge. the two types of charge are equal and opposite. in an atom of matter, an electrical charge occurs whenever the number of protons in the nucleus differs from the number of electrons surrounding that nucleus.