.Although diffusion occurs naturally without action from a cell, diffusion benefits cels. How do cells benefit from diffusion?
O
Cells increase concentration of certain molecules
O
Cells achieve balance with their environment
O
Cells decrease concentration of certain molecules
O
All of the above are correct

In an experiment examining the effects tai chi on arthritis pain, callahan (2010) selected a large sample of individuals with doctor-diagnosed arthritis. half of the participants immediately began a tai chi course and the other half (the control group) waited 8 weeks before beginning. at the end of 8 weeks, the individuals who had experienced tai chi had less arthritis pain that those who had not participated in the course.