BPK 142 Lecture Notes - Lecture 5: Skeletal Muscle, Cardiac Muscle, Myology

• School: Simon Fraser University
• Department: Biomedical Physio & Kines
• Course: BPK 142
• Professor: Brent Flodin

Document Summary

Muscle cells ( bers) are the only cells in the body that have the property of contractility, which allows them to shorten and develop tension. There are three types of muscle tissue: skeletal muscle, smooth muscle, and cardiac muscle: skeletal muscle. The contractile molecules are very organized, giving skeletal muscle a striated (striped) pattern. Skeletal muscle compromises about 36% of the total body weight in women and 42% in men. The remainder consists of: inorganic salts (k+, cl-), pigments, fats, and carbohydrates: smooth muscle. Found in the walls of hollow organs and blood vessels. Contractile molecules are not aligned, creating smooth appearance. Connections between cells allow them to contract together (syncytium: cardiac muscle. The contractile tissue of the heart wall. Has characteristics of both smooth muscle and skeletal muscle. Like skeletal muscle, the contractile molecules are organized. Like smooth muscle, it is also under involuntary control. More muscle stabilizers are require using free weights compared to using weight machines.