Which of the following demonstrates the graded response of whole muscle?
a. The amount of force produced by any given muscle is always the same as long as threshold has been reached.
b. The force generated to lift a feather is much less than the force required to lift a 25-pound weight.
c. A muscle will either contract all at once or not at all.
d. Muscles are organized into antagonistic pairs within the body.
Answer: b. The force generated to lift a feather is much less than the force required to lift a 25-pound weight.
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