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Multiple Choice
Exhaustion of glycogen storage within a muscle fiber would have the biggest effect on which of the following?
A
The ability to sustain prolonged muscle contraction
B
The production of synovial fluid
C
The rate of nerve impulse transmission
D
The structure of the sarcolemma
Verified step by step guidance
1
Understand the role of glycogen in muscle fibers: Glycogen is a stored form of glucose in muscle cells, and it serves as a critical energy source during prolonged muscle activity. When glycogen is depleted, the muscle fiber loses its ability to sustain energy production for extended contractions.
Analyze the options provided: The question asks which function would be most affected by glycogen depletion. Consider each option and its relationship to glycogen storage and energy production.
Option 1: 'The ability to sustain prolonged muscle contraction' - Muscle contraction requires ATP, which is generated through glycogen breakdown during prolonged activity. Glycogen depletion would directly impair this process.
Option 2: 'The production of synovial fluid' - Synovial fluid is produced by synovial membranes in joints and is unrelated to glycogen storage in muscle fibers. This option is not affected by glycogen depletion.
Option 3: 'The rate of nerve impulse transmission' and Option 4: 'The structure of the sarcolemma' - Both nerve impulse transmission and sarcolemma structure are not directly dependent on glycogen storage. Glycogen depletion primarily impacts energy availability for muscle contraction, not these processes.