Catecholamines and their metabolites including

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catecholamines and their metabolites, including vanillylmandelic acid (VMA). A subsequent CT scan confirmed the presence of a tumor in the adrenal medulla. Surgery to remove the tumor was scheduled. 1. What is pheochromocytoma?
2. What are the catecholamines? Which is the predominant compound?
3. Describe the relationship of the adrenal medulla to the autonomic nervous system.
4. Under what conditions are the catecholamines typically released?
5. How are catecholamines normally eliminated from the blood?
6. Is heart rate slower or faster than average in this patient? Why? What autonomic receptors are involved with this change in heart rate?

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