MUSCLE PHYSIOLOGY

Detailed explanation-1: -Cardiac and skeletal muscle both possess striations. Bundles of muscle fibers are known as aponeuroses. Aerobic, or endurance, exercise involves jogging or biking.

Detailed explanation-2: -An aponeurosis is a delicate, thin sheet of tissue that contains collagen-releasing cells called fibroblasts. It contains bundles of collagen fibers organized in a parallel pattern, which keeps it strong. You rarely injure your aponeuroses because they’re hidden under many layers of bone and muscle.

Detailed explanation-3: -Each bundle of muscle fiber is called a fasciculus and is surrounded by a layer of connective tissue called the perimysium.

Detailed explanation-4: -In contrast, those muscles on the extensor side of the thigh, e.g., the quads (quadriceps femoris), are pennate muscles. The fibers of these muscles are shorter and are situated at an angle to the long axis of the muscle.

Detailed explanation-5: -Skeletal and cardiac muscle are referred to as striated muscle because of the visible organization of repeating units of contractile filaments, known as sarcomeres, into cylindrical bundles called myofibrils.