Which ion concentration does the pH scale measure? How long is the scale?

smooth muscle is composed of involuntary muscles found within the walls of organs and structures such as the esophagus, stomach, intestines, and blood vessels. those muscles push materials like food or blood through organs. unlike skeletal muscle, smooth muscle can never be under your control.

i think the answer is terrae but not 100 percent sure. ▓▬▬ §