It’s 2:00 in the afternoon and you haven’t eaten anything since breakfast

Match the following terms describing electrical events with the correct phases of the cardiac cycle. the ventricular muscle cells depolarize at the start of this phase. during this phase, na+ entry through the funny channels causes the pacemaker potential of sa nodal cells to gradually become less negative until it reaches threshold. the ventricular muscle cells repolarize right before this phase. the cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase. a. isovolumetric relaxation b. ventricular ejection c. isovolumetric contraction d. ventricular filling

Nucleic acids offer variability because they contain alternate forms of genes called .

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?