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.
In short, stimulation of the sympathetic branch of the autonomic nervous system prepares the body for emergencies: for  fight or flight  (and, perhaps, enhances the memory of the event that triggered the response).1  a single preganglionic neuron usually synapses with many postganglionic neurons; The first, the preganglionic neurons, arise in the CNS and run to a ganglion in the body. 2  Here they synapse with. 3  postganglionic neurons, which run to the effector organ (cardiac muscle, smooth muscle, or a gland). 4  sympathetic nervous system and the. 5  parasympathetic nervous system.