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Ch. 14 The Autonomic Nervous System
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All textbooksMarieb, Hoehn 7th EditionCh. 14 The Autonomic Nervous SystemProblem 10

Chapter 13, Problem 10

Which of the effects listed in response to question 9 would be reversed by parasympathetic activity?

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Hey, everyone. Let's take a look at this question together which of the following is an effect of parasympathetic activity on the cardiovascular system. Is it answer choice. A decrease heart rate. Answer choice B reduction of blood pressure. Answer choice C increased heart rate. Answer choice D dilation of pupil or answer choice. E both answer choice is A and answer choice. B let's work this problem out together to try to figure out which of the following answer choices is an effect of parasympathetic activity on the cardiovascular system. So when it comes to an effect of parasympathetic activity on the cardiovascular system, we note that it includes the slowing of the art rate which is caused by a decreased fire rate of the sinoatrial node in the heart. And we also know that another effect of parasympathetic activity on the cardiovascular system is the reduction of blood pressure. And we note that this is caused by the dilation of blood vessels which leads to a decrease in systemic vascular resistance contributing to that reduction of blood pressure. So, an effect of parasympathetic activity on the cardiovascular system involves a decreased heart rate as well as a reduction of blood pressure. So looking at our answer choices, we can see that we have a decreased heart rate and we have reduction of blood pressure. So answer choices, A and B are correct, giving us answer choice. E as the correct answer. Since answer choice, A A decreased heart rate and answer choice B A reduction of blood pressure are both effects of parasympathetic activity on the cardiovascular system. I hope you found this video to be helpful. Thank you and goodbye.
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