What is rapid stimulus?

What is rapid stimulus?

• A. Constant contraction or tetanus
• B. A brief twitch contraction
• C. Rapid burst without sustained contraction
• D. No contraction

Answer: (A)

Rapid stimulation means impulses arrive so often that there isn’t time for the muscle to relax between them. Each new impulse adds to the previous contraction, and as the frequency increases the twitches fuse into a single, sustained contraction called tetanus. That’s why a rapid stimulus best describes constant contraction or tetanus. A lone impulse gives a brief twitch; a rapid burst that doesn’t sustain would imply incomplete tetanus or insufficient frequency, and no contraction happens only without any stimulus.

Rapid stimulation means impulses arrive so often that there isn’t time for the muscle to relax between them. Each new impulse adds to the previous contraction, and as the frequency increases the twitches fuse into a single, sustained contraction called tetanus. That’s why a rapid stimulus best describes constant contraction or tetanus. A lone impulse gives a brief twitch; a rapid burst that doesn’t sustain would imply incomplete tetanus or insufficient frequency, and no contraction happens only without any stimulus.