April-October (High Season): you need at least 5 nights in Santorini as you will spend lots of time on the beaches. November-March (Low Season): you need at least 3 nights in Santorini and do other things. Ideal: 10 days in Santorini during the best time of the year for the island. Over 3 nights in Greece: at least 50% of your time in Greece should be spent in Santorini and at least 25% in Mykonos. Less than 3 nights in Greece: 2 nights Santorini and 1 night Athens if you are flying through Athens or 3 nights only in Santorini if you are flying directly to Santorini.
The postganglionic neurons of sweat glands release acetylcholine for the activation of muscarinic receptors. The chromaffin cells of the adrenal medulla are analogous to post-ganglionic neuronsâthe adrenal medulla develops in tandem with the sympathetic nervous system and acts as a modified sympathetic ganglion.
It is released at various sites: 1  All post ganglionic parasympathetic fibers. 2  Autonomic ganglia. 3  NMJ. Sympathetic fibers i.e. sweat glands and some blood vessels.  Preganglionic fibers of adrenal 1  medulla. In brain.  Certain organs unrelated to the nerve fibers e.g. certain cells in 1  placenta. Certain ciliated epithelial  cells.