Beta-blockers sympathetic input to the heart resulting in aln)_in heart rate O Inhibit, increase O inhibit, decrease O stimulate, increase O stimulate decrease 15 1/2 Select all answers that correctly describe the function of the heart conduction system. The membrane potential of AV node cells is able to depolarisatregular intervals. 9 The membrane potential of SA node cells depolarizes at regular intervals. The efflux of calcium ions helps SA and AV node cells reach action potential. V Electrical activity moves from the SA node to the AV node through Purkinje fibers. 16 2 LP.has been diagnosed with hypertrophic cardiomyopathy (enlargement and stiffening of the left ventricle) and heart failure His lab results reveal an/a natriuretic peptide) levels as his heart tries to BNP (B-type blood pressure and heart workload O increase decrease O decrease increase O decrease: decrease O increase: increase 44 0/2i Which of the following could cause a low hematocrit (red blood cell count)? O pregnancy O asthma O congestive heart failure O kidney tallure