Answer
See explanation
Work Step by Step
1. Single Muscle Twitch:
A single muscle twitch refers to a brief contraction-relaxation cycle of a muscle fiber in response to a single action potential (nerve impulse). It consists of three main phases: latent period, contraction phase, and relaxation phase.
2. Summation:
Summation occurs when multiple action potentials are delivered in rapid succession to a muscle fiber, leading to increased force of contraction compared to a single twitch.
3. Tetanus:
Tetanus is a sustained and fused contraction of a muscle in response to a high-frequency stimulation. It occurs when a muscle is stimulated so rapidly that the muscle fibers do not have a chance to relax between stimuli.
