Amacrine cells secrete all except

Amacrine cells are interneurons in the retina. Amacrine cells are inhibitory neurons and project their dendritic arbours to the inner plexiform layer (IPL), there interacting with retinal ganglion cells and/or bipolar cells. The amacrine cells transmit signals in two directions, either directly from bipolar cells to ganglion cells or horizontally within the inner plexiform layer from axons of the bipolar cells to dendrites of the ganglion cells or to other amacrine cells.Histological and pharmacological studies have proven the existence of many types of amacrine cells that secrete at least eight types of transmitter substances, including gamma-aminobutyric acid (GABA), glycine, dopamine, acetylcholine, and indolamine, all of which normally function as inhibitory transmitters.Ref: Guyton 13e pg: 656