During strenuous exercise, oxygen used to make ATP can become depleted. How would the muscle cells respond to this? Group of answer choicesThe muscle cells would immediately begin making ATP from glucose.The muscle cells would shut down and glycolysis would cease to function.The muscle cells would begin converting pyruvate into lactic acid through fermentation.The muscles cells would begin obtaining oxygen from other tissues in order to keep working.
Question
During strenuous exercise, oxygen used to make ATP can become depleted. How would the muscle cells respond to this? Group of answer choicesThe muscle cells would immediately begin making ATP from glucose.The muscle cells would shut down and glycolysis would cease to function.The muscle cells would begin converting pyruvate into lactic acid through fermentation.The muscles cells would begin obtaining oxygen from other tissues in order to keep working.
Solution
The muscle cells would begin converting pyruvate into lactic acid through fermentation.
Here's the step by step explanation:
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During strenuous exercise, the demand for energy (ATP) in muscle cells increases.
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Oxygen is normally used in the mitochondria of cells to produce ATP in a process called aerobic respiration.
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When the exercise is so intense that the oxygen supply becomes depleted, the cells can no longer produce enough ATP through aerobic respiration.
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To compensate for this, the cells switch to a process called anaerobic respiration or fermentation.
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In this process, glucose is broken down into pyruvate through a process called glycolysis, which also produces a small amount of ATP.
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The pyruvate is then converted into lactic acid. This process does not require oxygen and can therefore continue even when oxygen is depleted.
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The lactic acid can build up in the muscles, contributing to muscle fatigue. However, it allows the muscles to continue working for a short period of time until the oxygen supply can be restored.
Similar Questions
During the transition from rest to exercise there is an oxygen deficit, with the major contribution to energy metabolism coming from:Group of answer choicesIntramuscular ATP stores"Anaerobic" glycolysis of muscle glycogenCreatine phosphate degradation
Complete each sentence with the correct word. In the early stages of exercise ATP is produced by the action of .The high energy molecule that donates a phosphate to ADP is .Each glucose molecule metabolized by produces two ATP, allowing for muscle activity to continue for an additional 30-40 seconds.As the delivery of oxygen to the muscle increases during the course of exercise, ATP production occurs primarily via .
Muscle cells use lactic acid fermentation toMultiple Choiceregenerate NAD+ so that glycolysis can continue in the absence of oxygen.produce ATP in the presence of oxygen.produce more ATP than in respiration.allow an animal to survive for long periods of time in the absence of oxygen.produce less CO2.
The bioenergetic pathway that first provides ATP for skeletal muscle at the onset of exercise is
If muscle glycogen is the initial substrate, the net production of ATP resulting during glycolysis is.
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