Which of the following muscles have the longest refractive period?(a) Skeletal muscles(b) Smooth muscles(c) Cardiac muscles(d) Facial musclesThis question was posed to me by my school principal while I was bunking the class.This interesting question is from ECG in portion Body Fluids and Circulation of Biology – Class 11

Which of the following muscles have the longest refractive period?(a)

1.	Which of the following muscles have the longest refractive period?(a) Skeletal muscles(b) Smooth muscles(c) Cardiac muscles(d) Facial musclesThis question was posed to me by my school principal while I was bunking the class.This interesting question is from ECG in portion Body Fluids and Circulation of Biology – Class 11
Answer» Right OPTION is (C) Cardiac muscles Easiest explanation: Cardiac muscles never show the PROPERTY of summation or tetanus spasm as the muscles have the longest refractory period. Cardiac muscles ALSO have the least latent period.

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