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Whole muscle tension depends on the ____ of the muscle, the ____ of motor unit recruitment, and the size of each motor unit
Muscles performing refined/delicate movements (hands) have _____(quantity) muscle fibers per motor unit
1 of 3 stages of a muscle twitch; uptake of calcium into the sarcolemma; muscle returns to its original length
contractions stronger later in response to stimuli of same strength; possibly due to increased availability of calcium
depnds on LENGTH of fiber at the ONSET of contraction
the optimal length is the RESTING MUSCLE LENGTH
type of contraction; muscle tension developed < than load
cannot do work, as it cannot move the load a distance
ATP is generated ____(#) ways for the muscle contraction
1. Direct phosphorylation Creatine phosphate +ADP = ATP
2. Oxidative phosphorylation = 36 ATP
3. Glycolysis = 2 ATP + lactic acid
cycle that uses
lactic acid in glycolysis >(resynthesized)> glucose in liver >> gluconeogenesis (requires 6 ATP to produce 2 ATP) >>undergoes aerobic respiration >> 36 ATP
when the CNS can no longer activate motor neurons supplying working muscles; psychological; biochemical changes at the synapse
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