1 - False
2 - False
3 - True
4 - True
5 - True
6 - False, H3O+
7 - False
8 - True
9 - False, 1x10^-7
10 - True
The central nervous system protects our muscles from tearing by reducing the rate nerve impulses are sent to our working muscles. You'll experience central fatigue before local fatigue. In other words, when you think you simply can't do any more work because you're so fatigued, essentially what's happening is your mind is telling your body muscles to shut down.
In the year 1850, Rudolf Virchow was studying cells under a microscope, when he observed that cells were dividing and forming new cells. Realizing what he had observed, he understood that living cells reproduce new cells through division. Basing on his conclusion and realization, Virchow proposed that living cells came only from the other living cells.
