MUSCLE PHYSIOLOGY TEST
what is the muscle tissue behavior?
Excitable, extensibility (stretches), elasticity, & contractility
What are types of muscle tissue?
skeletal for skeletal movement, cardiac for heart beat, smooth for internal organ movement.
Who are the thin moving myofilaments?
a...
what is the muscle tissue behavior?
Excitable, extensibility (stretches), elasticity, & contractility
What are types of muscle tissue?
skeletal for skeletal movement, cardiac for heart beat, smooth for internal organ
movement.
Who are the thin moving myofilaments?
actin
Who are the thick nonmobile myofilaments?
myosin
What is all the fibers with its motor neuron called?
Motor unit
What is the A band?
actin and myosin
What are the steps of sliding filament model?
1) Myosin heads ATTACHES to actin forming crossbridges
2) Myosin heads PIVOTS toward center of the sarcomere (power stroke)
3) As myosin heads bind ATP, the crossbridges DETACHES from actin
4)Myosin heads split ATP and become REORIENTED/RETURN TO NORM and
energized
Describe cardiac muscle
Heart muscle it is striated and branched, involuntary, reacts quickly & uninucleated with
intercalated discs
Describe skeletal muscle
Multinucleated, striated and voluntary
Describe smooth muscle
uninucleated, non-striated, involuntary
lines hollow organs
flat tendon
aponeurosis
What are the types of muscle attachments?
Directly attached to bone, indirectly to a sheath-like tendon that attaches to bone, or
aponeurosis a sheetlike, flat tendon(abdomen)
In the sliding filament model, what is the function of calcium ions?
To have tropomyosin to unblock the myosin binding sights.
What is the action potential?
a neural impulse; a brief electrical charge that travels down a motor neuron to stimulate
a muscle
What is the muscle layers outer to inner
Endimysium bundles all fasicles-Permysium holds bundles of fibers-Endomysium cover
sarcolemma
Tetanus
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