text: The aorta often features a cluster of cells normally found in this structure called the organ of Zuckerkandl.
full_question: The aorta often features a cluster of cells normally found in this structure called the organ of Zuckerkandl. Phenylethanolamine N-methyltransferase catalyzes methylation of a hormone released by this structure derived from dopamine. Simple virilizing and salt-wasting forms of a hyperplasia of this gland result from deficient 21-hydroxylase activity in its zona fasciculata. Pheochromocytomas originate from this structure's chromaffin cells. The outermost portion of this structure produces mineralocorticoids such as aldosterone. Its medulla secretes catecholamines, and ACTH triggers its cortex to produce cortisol. For 10 points, name this gland that produces epinephrine and is found on top of the kidney.
first_sentence: The aorta often features a cluster of cells normally found in this structure called the organ of Zuckerkandl.
raw_answer: adrenal glands