Match each statement/descriptor in the left-hand column to the appropriate type

Question

Match each statement/descriptor in the left-hand column to the appropriate type of skeletal muscle fibers [listed in the right-hand column] to which it most aptly applies.

1) Slow Oxidative Fibers

2) Fast Oxidative Fibers

3) Fast Glycolytic Fibers

effectively use both aerobic and anaerobic respiration to meet their energy needs have the fewest mitochondria have the smallest diameters have intermediate amounts of stored glycogen are also known as 'endurance fibers' contain an isoform of myosin ATPase that hydrolyzes ATP ADP + Pi more slowly than the ATPases utilized by other fiber types are highly resistant to fatigue are highly susceptible to fatigue have the highest glycogen contents rely predominantly on aerobic respiration to meet their energy needs, have limited capacity for anaerobic metabolism have an intermediate degree of vascularization as compared to the other fiber types have the highest concentrations of myoglobin

Explanation / Answer

1) Slow Oxidative Fibers: are also known as 'endurance fibers'

rely predominantly on aerobic respiration to meet their energy needs, have limited capacity for anaerobic metabolism

are highly resistant to fatigue

2) Fast Oxidative Fibers:effectively use both aerobic and anaerobic respiration to meet their energy needs

3) Fast Glycolytic Fibers:have the highest glycogen contents

are highly susceptible to fatigue

contain an isoform of myosin ATPase that hydrolyzes ATP ADP + Pi more slowly than the ATPases utilized by other fiber types

have an intermediate degree of vascularization as compared to the other fiber types

have the fewest mitochondria

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