Hypertension Hypertension, or high blood pressure, is highly affected by the concentration of angiotensin. Injection of angiontensin has actually been long used to induce hypertension in animal test models to study the effects of various therapies and medications. In such experiments, it has been observed that an intact and functioning<unk>  limits the increase in mean arterial pressure due to the increased angiotensin. Dehydration As stated above, angiotensin receptors (AT1) have been shown to be upregulated due to water deprivation. These AT1 receptors have also shown an increased bonding with circulating angiotensin after water deprivation. These findings could indicate some sort of morphological change in the AT1 receptor, likely due to some signal protein modification of the AT1 receptor at a non-bonding site, leading to an increased affinity of the AT1 receptor for angiotensin bonding.
Subfornical organ
Stellate ganglion
Meibomian gland
Olfactory trigone
Syrinx 
Medulla 
Medulla
Aorticorenal ganglion