8. Which system works most directly with the nervous systen to move the body?
10 points
A-immune
B-respirato
C-digestive
D- muscular

Which statement is most likely megan’s conclusion? the hypothesis is supported because the most common blood type in the united states is ab+. the hypothesis is not supported because the most common blood type in the united states is o+.

The large ground finch obtains food by cracking seeds. what is its short, strong beak an example? a) tendency toward perfection b) adaptation of a species over time c) selective use and disuse of an organ over time d) scarcity of recourses

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