A. what is a positively charged ion; an atom which has lost an electron
b. what is a negatively charged ion; an atom which has gained an electron
c. what is the compound formed by the ionic bonding of a cation and anion
d. what is a measure of the hydrogen ion concentration in a solution
answer box
~ph
~salt
~anion
~cation

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

Give examples of selective advantage of organism’s body part/organ

Drag each label to the correct location on the chart. match the function to the type of tissue