Which of the following is FALSE of sympathetic activity to the SA node A

Which of the following is false of sympathetic

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60) Which of the following is FALSE of sympathetic activity to the SA node?A) Norepinephrine binds to beta1adrenergic receptors.B) cAMP levels in the pacemaker cells increases.C) Funny channel opening is enhanced.D) The rate of spontaneous depolarization is increased.E) Potassium channel closing is enhanced.Answer: EDiff: 4 Page Ref: 38661) Which of the following would NOT result from an increase in ventricular contractility?EDiff: 5 Page Ref: 38862) Under resting conditions, heart rate is primarily under the control of what control system?ADiff: 5 Page Ref: 38663) An increase in heart rate can be mediated through which of the following?EDiff: 5 Page Ref: 38613
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64) Which of the following variables is NOT involved in the regulation of stroke volume?A) ventricular contractilityB) preloadC) parasympathetic nervous activityD) sympathetic nervous activityE) afterloadAnswer: CDiff: 4 Page Ref: 38865) Which of the following hormones does NOT increase cardiac contractility?EDiff: 6 Page Ref: 38966) Which of the following best describes the effect of sympathetic activity on ventricular contractile cells?CDiff: 5 Page Ref: 389
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