Image Based Question – 74613

Calculate the tetanizing; frequency of the frog’s gastrocnemius muscle from the graph shown below:

A. 25-30 Hz

B. 30-35 Hz

C. 35-40 Hz

D. 40-50 Hz

Correct Answer » A Explanation

Answer- A. 25-30 Hz

• Tetany is the continuous contraction of muscle fibers, without latent period & relaxation period.
• Tetanizing frequency depends on contraction time.
• Twitch duration = Contraction period= 40 millisecond = 0.04 sec (l millisecond=0.001 second)
• Tetanizing frequency = l/Contraction period =  l/0.04= 25 Hz