6. Compare/contrast cardiac muscle with skeletal muscle. In afigure show the ion fluxes associated with an action potential incontractile cardiac muscle fibers.
8. Compare the electrical activity (ion current fluxes) incardiac pacemaker cells with that found in cardiac muscle cells.Specify an additional role for calcium in the cardiac muscle cellaction potential. Use a figure.
11. When looking at the extrinsic control of the arterioles,explain how sympathetic stimulation (stress) affects the blood flowand diameter of vessels in the heart vs circulatory system whencomparing alpha-1 receptors and beta-2 adrenergic receptors. Whatare the corresponding ligands (hint…abcd)?
