(1) There, Robert can treat himself to a personalised u2018gentlemen's programme u2019, which offers a series of treatments to revive his tonicity , balance and energy.(2) Betaine is one of several compounds used by cells to regulate osmotic pressure and has been recognized as an important osmolyte that maintains cellular tonicity .(3) the tonicity of the fluid(4) Hyponatremia in association with normal tonicity is a laboratory phenomenon.(5) Antidiuretic hormone, which is secreted in response to stimuli such as changes in blood volume, tonicity , and blood pressure, is the primary regulator of body water.(6) It is because the solution has the same tonicity as blood.(7) the tonicity of the fluid(8) As the electrolytes shift out of the cells, fluid shifts into the cells so that the tonicity matches that of the extracellular space.