Which type of contraction allows a muscle to produce tension

Question

Problem: Which type of contraction allows a muscle to produce tension without changing the angle of a skeletal joint or moving a load?

• A functional group of sarcomeres
• All of the muscle fibers in a specific muscle
• A motor neuron and the muscle fibers it innervates
• The sarcomere and its associated sarcolemma
• A packet of actin and myosin microfilaments