Which of the following would decrease heart rate?
A) increased sympathetic stimulation of SA node
B) decreased parasympathetic stimulation of nodal fibers
C) increased levels of norepinephrine and/or epinephrine
D) faster depolarization of the pacemaker potential
E) increased parasympathetic stimulation of nodal fibers.
Answer: E
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a) exocrine glands. b) skeletal muscle. c) cardiac muscle. d) smooth muscle. e) endocrine glands.
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Fill in the blank(s) with the appropriate word(s).