Increased Phosphate Ion Concentration Is Believed to Contribute to Fatigue

question 149

Multiple Choice

Increased phosphate ion concentration is believed to contribute to fatigue by interfering with

• A) calcium release from the sarcoplasmic reticulum.
• B) levels of available ATP to provide energy for contraction.
• C) phosphate release by myosin heads during crossbridge cycling.
• D) ACh release by synaptic knobs of motor neurons.

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