1. Locomotion and Digestion
... legs, which carry the weight of the body. Each leg and foot has a total of 30 bones. Animals have evolved specialized cells capable of shape changes. These cells contain numerous filaments of the proteins actin and myosin, are called muscle cells. There are three kinds of muscle cells in vertebrates: ... contract. Binding of the myosin head to actin constitutes the formation of a cross-bridge between myosin and actin. Cross-bridge formation causes a conformational (shape) change in the myosin head, which pulls the thing filament toward the center of the sarcomere. Binding of another mole...
- Word Count: 9019
- Approx Pages: 36
- Has Bibliography
- Grade Level: Undergraduate