AHCDW7SOL98.pdf - 98 Award 1.00 point Problems Adjust...

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Unformatted text preview: 98. Award: 1.00 point Problems? Adjust credit for all students. Consider the causes of muscle fatigue. Then click and drag each label into the appropriate category based on whether it is a cause of fatigue from predominantly high-intensity short duration exercise, low-intensity long duration exercise, or neither. and ADP toaccumulation due ATP hydrolysis Decrease the concentration ion inpotassium levelsDecrease in potassium oxygen Increased ofcross-bridge inhibition acid Lactic from impulses nerve Decrease stored sarcoplasm Decrease Electrolyte ATP ion concentration in the sarcoplasm Lactic acid inhibition of cross-bridge formation ATP depletion Electrolyte loss Decrease in nerve impulses from the CNS Decrease in sarcoplasm pH Decrease in hydrolysis of ATP due to accumulation of ADP and phosphate Decrease in stored glucose Increased oxygen levels in the sarcoplasm Hypoglycemia High-Intensity Low Duration Decrease in potassium ion concentration in the sarcoplasm Decrease in sarcoplasm pH Decrease in hydrolysis of ATP due to accumulation of ADP and phosphate Low-Intensity High Duration Neither Electrolyte loss ATP depletion Decrease in nerve impulses from the CNS Lactic acid inhibition of cross-bridge formation Increased oxygen levels in the sarcoplasm Decrease in stored glucose Hypoglycemia Explanation: In high­intensity, short­duration exercise, fatigue is thought to result from the following factors: Potassium accumulation, ADP/Pi accumulation, and lactic acid accumulation. In low­intensity, long­duration exercise, fatigue may result partially from the preceding causes, but it results predominantly from the following: Fuel depletion. Declining levels of muscle glycogen and blood glucose leave less fuel for ATP synthesis, electrolyte loss (the loss of electrolytes through sweating can alter the ion balance of the extracellular fluid enough to reduce muscle excitability), and central fatigue (for reasons not yet well understood, the central nervous system produces less signal output to the skeletal muscles. This is where psychological factors come into play, such as the will to complete a marathon). Hints Hint #1 References eBook & Resources ...
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