Pathology In the presence of a drug that blocks all effects of norepinephrine and epinephrine on the hea, the autonomic nervous system can A Raise the hea rate above its intrinsic rate B Lower the hea rate below its intrinsic rate C Raise and lower the hea rate above and below its intrinsic rate D Neither Praise nor lower the hea rate from its intrinsic rate 💡 Explanation In the presence of a drug that blocks all effects of norepinephrine and epinephrine on the hea, the autonomic nervous system can ✓ Correct Answer: B. Lower the hea rate below its intrinsic rate