Not necessarily, although its symbol is the water carrier, Aquarius is an AIR sign.  The water in Aquarius is symbolic of knowledge, especially spiritual.  Swimming in water â¦ is using it for a different purpose to, e.g. carrying it in a container.
Autoregulation is a process within many biological systems, resulting from an internal adaptive mechanism that works to adjust (or mitigate) that system's response to stimuli. While most systems of the body show some degree of autoregulation, it is most clearly observed in the kidney, the heart, and the brain. Perfusion of these organs is essential for life, and through autoregulation the body can divert blood (and thus, oxygen) where it is most needed. 1 Cerebral autoregulation.
acetylcholine The acetyl derivative of choline, produced at cholinergic nerve endings both in the brain, where it acts as a chemical transmitter, and at the junctions between nerves and muscles, where it stimulates muscle contraction.cetylcholine (ACh) One of the main neurotransmitters of the vertebrate nervous system. It is released at certain (cholinergic) nerve endings and may be excitatory or inhibitory; it initiates muscular contraction at neuromuscular junctions.