all 3? Which statement about muscle contractions is false? O An action potential in the muscle…

all 3?
Which statement about muscle contractions is false? O An action potential in the muscle cell activates contraction by releasing Car within the muscle. O A single action potential at the neuromuscular junction is sufficient to cause a muscle to twitch. O Summation of twitches leads to a graded increase in the tension that can be generated by a single muscle fiber. The tension generated by a muscle can be varied by controlling how many of its motor units are active. When maximum muscle tension is achieved, no ATP is required to maintain that level of tension How can muscle fibers show a range of responses to different levels of stimulation? O O A new contraction can occur only after the resting condition is reached Each muscle fiber contraction is all or none Individual twitches in the same fiber can summate. Following stimulation, the fiber stays contracted. What is the term given to summation of frequent muscle twitches to give maximum contraction? Facilitation O Motor unit summation Tetanus Twitch MORE