Answer the following question given this paragraph: 

Figure 41.2 Cells placed in a hypertonic environment tend to shrink due to loss of water. In a hypotonic environment, cells tend to swell due to intake of water. The blood maintains an isotonic environment so that cells neither shrink nor swell. (credit: Mariana Ruiz Villareal).


Q: An environment in which cells neither sink nor swell is known as what?


A:
isotonic environment