IN experiments to probe the mechanism of transmission of sympathetic activity at the adrenal medulla we have found that acetylcholine, which is believed to be the chemical transmitter, evokes ...

The brain stem is a portion of the brain made of four distinct sections: the diencephalon, mesencephalon, pons, and medulla oblongata. Each of these sections has associated functions which are vital ...

The medulla region of a human thymus from a 1-year-old patient, showing epithelial cells (cyan and yellow), fibronectin, a protein of the extracellular matrix (magenta), and Polykeratin stem cells are ...