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Which of the following does not control ...

Which of the following does not control heart beats?

A

Vagus

B

Epinephrine

C

Norepinephrine

D

Glossopharyngeal nerve

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question "Which of the following does not control heart beats?" we will analyze each of the provided options one by one. ### Step 1: Understand the options The options given are: 1. Vagus nerve 2. Epinephrine 3. Norepinephrine 4. Glossopharyngeal nerve ### Step 2: Analyze the Vagus Nerve The vagus nerve is a crucial part of the autonomic nervous system. It plays a significant role in regulating heart rate. Specifically, the vagus nerve decreases the heart rate by releasing acetylcholine, which acts on the heart's pacemaker cells. **Hint:** The vagus nerve is known for its role in decreasing heart rate. ### Step 3: Analyze Epinephrine Epinephrine, also known as adrenaline, is a hormone released during the "fight-or-flight" response. It increases heart rate and the force of heart contractions, thereby increasing blood pressure. **Hint:** Epinephrine is associated with increasing heart rate during stress. ### Step 4: Analyze Norepinephrine Norepinephrine, or noradrenaline, is another hormone involved in the "fight-or-flight" response. It primarily acts to constrict blood vessels and can also increase heart rate, although its primary role is more about increasing blood pressure. **Hint:** Norepinephrine can also increase heart rate, but it is more about blood vessel constriction. ### Step 5: Analyze the Glossopharyngeal Nerve The glossopharyngeal nerve is primarily responsible for functions related to the throat, including taste and swallowing. It does not have a direct role in controlling heartbeats. **Hint:** The glossopharyngeal nerve is not involved in heart rate control; it deals with throat functions. ### Conclusion After analyzing all the options, we conclude that the **glossopharyngeal nerve** does not control heartbeats. Therefore, the correct answer is the glossopharyngeal nerve. ### Final Answer **The correct option is the glossopharyngeal nerve.**
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