Question

pheochromocytomas are tumors found in the: adrenal medulla hypothalamus neurohypophysis basal nuclei adrenal cortex

Explanation:

Pheochromocytomas are tumors that arise from chromaffin cells. These cells are mainly located in the adrenal medulla. The adrenal medulla is responsible for producing and secreting catecholamines such as adrenaline and nor - adrenaline. Tumors here can cause over - secretion of these hormones leading to various symptoms.

Answer:

A. Adrenal medulla