Chromaffin cell. Chromaffin cells, also pheochromocytes, are neuroendocrine cells found mostly in the medulla of the adrenal glands (located above the kidneys) in mammals.
The elements sodium (Na) and potassium (K) have been detected in the Moon's atmosphere using Earth-based spectroscopic methods, whereas the isotopes radon -222 and polonium -210 have been inferred from data obtained by the Lunar Prospector alpha particle spectrometer.
Footnotes. 1  The synodic period of the moon, or synodic month, is the orbital period of the moon with respect to the sun. Since lunar phases depend upon the relative positions of the sun, moon, and earth, the synodic month is the period over which the moonâs phases repeat.