2. Given: A gastrocnemius muscle at its optimal length, when maximally stimulate

Question

2. Given: A gastrocnemius muscle at its optimal length, when maximally stimulated by a single electrical stimulus, produces an isometric twitch force of 80N, and consumes 6 joules of energy above its basal energy consumption (measured by a calorimeter-includes all the energy used by the muscle as a result of that stimulus). If you then stretch the muscle (hyper-extend it) so that the same maximal electrical stimulus produces no twitch tension at all, stimulating the muscle raises its energy consumption by only 0.5 Joule above its basal energy consumption (measured again with the calorimeter). a. The 6 Joules of energy consumed by the muscle during a maximal stimulus at optimal length were used for what? BE SPECIFIC b. The 0.5 Joules of energy consumed by the muscle during a maximal stimulus at hyper- extended length was used for what? BE SPECIFIC c. Explain the difference in amplitude of the twitch tension between optimal length and hyper-extended length. BE SPECIFIC

Explanation / Answer

Ans. a) The 6J of energy was consumed to initiate the twitch in the muscles.

b) 0.5J of energy was consumed for initiating response

c)

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