The Ca 2+ levels, released by agonist-induced activity of phospholipase C, determine which contractile pathway is activated. In the following subsections we discuss in some detail some of the steps ...

Panel A shows the microscopic myoarchitecture of the circular and longitudinal muscle layers of the lower esophageal sphincter and stomach. The circular muscle fibers of the esophagus cross each other ...

Muscles and nerve fibers allow a person to move their body and enable the internal organs to function. There are more than 600 muscles in the human body. People also have different types of muscle. A ...