Girasol definition, an opal that reflects light in a bright luminous glow. See more.
Pheophytin or phaeophytin (abbreviated Pheo) is a chemical compound that serves as the first electron carrier intermediate in the electron transfer pathway of Photosystem II (PS II) in plants, and the photosynthetic reaction center (RC P870) found in purple bacteria.
What is a pheochromocytoma. Pheochromocytoma is a part of the pheochromocytoma and paraganglioma group of syndromes. A pheochromocytoma is a tumor arising in the adrenal gland medulla.A paraganglioma grows in the sympathetic or parasympathetic nerves. pheochromocytoma is a functional catecholamine-secreting tumor of the adrenal gland medulla. Catecholamines include epinephrine, norepinephrine and their derivatives. In normal amounts these hormones are responsible for regulating heart rate and blood pressure, among other functions.