What is the correct sequence of events that occur after the baroreceptor reflex is stimulated?
A) From the carotid artery to the vagus nerve to the medulla to increase parasympathetic activity and decrease sympathetic activity
B) From the carotid artery to glossopharyngeal cranial nerve through the vagus nerve to the medulla to increase sympathetic activity and decrease parasympathetic activity
C) From the carotid artery to glossopharyngeal cranial nerve through the vagus nerve to the medulla to increase parasympathetic activity and decrease sympathetic activity
D) From the carotid artery to glossopharyngeal cranial nerve through the vagus nerve to the hypothalamus to increase parasympathetic activity and decrease sympathetic activity

Question

Quizplus · Accepted Answer

The correct sequence of events after the baroreceptor reflex is stimulated involves the baroreceptors in the carotid artery signaling the glossopharyngeal cranial nerve, which then sends the signal to the medulla via the vagus nerve. In response to this signal, the medulla increases parasympathetic activity and decreases sympathetic activity, leading to a decrease in heart rate and blood pressure. Therefore, the best choice is C, as it accurately describes this pathway. Choice A is incorrect because it suggests that the signal goes directly from the carotid artery to the vagus nerve, which is not the case. Choice B is incorrect because it suggests that the medulla increases sympathetic activity, which is the opposite of what happens during the baroreceptor reflex. Choice D is incorrect because it suggests that the signal goes to the hypothalamus, which is not a part of the baroreceptor reflex pathway.

What Is the Correct Sequence of Events That Occur After