? Hypothalamic neurons are buy cialis super active online particularly sensitive to the composition of washing their blood: changes in pH, pCO2, pO2, catecholamines, potassium and sodium ions. In the supraoptic nucleus are osmoreceptors. Hypothalamus - the only structure of the brain in which there is no blood-brain barrier. Hypothalamic neurons capable of neurosecretion peptides, hormones, neurotransmitters. ???