Sacromere and sliding filament theory - (a) Describe the structure of a sarcomere and indicate the relationship of the sarcomere to the myofilament. (b) Explain the sliding filament theory of contraction inlcuding a relaxed and a contracted sarcomere

Muscle contraction - Describe in detail a muscle contraction and relaxation from the point of the nervous stimuli. Describe all cellular structures and physiological events that occur at the cellular and tissue level that are directly involved with the muscle contraction (receptors, etc.) I am referring to skeletal muscle (like contraction of a bicep).

Action potential in heart muscles and skeletal muscle differs in its mechanism. - Explain the difference between action potential of cardiac muscle, compared with skeletal muscle.

Understanding sacomeres, functional differences between skeletal and cardiac muscles, and muscle contraction in the human body. Complete with a diagram of a sacomere. - What is a sacomere? What are some functional differences between skeletal and cardiac muscles? What happens within the muscle fibers to cause a muscle to contract?

? How would the density of mitochondria in a muscle biopsy from the biceps of a weight lifter compare with those of the runner and the couch potato? - If muscle biopsies were taken from the legs of a world class Marathon runner and a typical couch potato, which would you expect to have a higher density of mitochondria. Why? How would the density of mitochondria in a muscle biopsy from the biceps o...