32. What is the major action mechanism of beta blockers in treatment of chronic heart failure? (A) reduced myocardial work load (B) improved cardiac contractility (C) increased afterload (D) reduced preload

6. Which of the following is correct regarding the autonomic nervous system? (A) Afferent neurons carry signals from the CNS to the effector organs (B) The neurotransmitter at the parasympathetic ganglion is norepinephrine (C) Sympathetic neurons release acetylcholine in the effiector organs (D) The neurotransmitter at the sympathetic ganglion is acetylcholine

32. What is the major action mechanism of beta blockers in treatment of chronic heart failure?
(A) reduced myocardial work load
(B) improved cardiac contractility
(C) increased afterload
(D) reduced preload

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