All of the following are found in both skeletal and cardiac muscle fibers except __________.
mitochondria
striations
intercalated disks
sarcomeres
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Which of these is true of cardiac muscle fibers?
Cardiac fibers branch.
Cardiac fibers have a single nucleus.
Cardiac fibers have a long twitch duration compared to skeletal fibers.
All of these are true of cardiac fibers.
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Large-diameter, densely packed myofibrils, large glycogen reserves, and few mitochondria are characteristics of
fast fibers.
slow fibers.
intermediate fibers.
fatty muscles.
red muscles.
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When comparing slow muscle fibers to fast muscle fibers, slow fibers
take about three times as long to reach peak tension.
have much smaller fiber diameters.
generate much less tension.
are rich in the red protein myoglobin.
All of the answers are correct.
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