anatomy review

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The segment of a myofibril that is called a sarcomere runs from ___________
One Z line to the next Z line
A motor unit is made up of _____________________
a motor neuron and the muscle fibers it innervates
the cross bridges involved in muscle contraction are located on the _________________________
myosin myofilaments
Which of the following does not belong with the others?
A) multinucleated
B) skeletal
C) striated
D) involuntary
involuntary
Which term is the smallest subdivision in this group?
actin
Muscle cells that are cylindrical, each with a single, centrally located nucleus, and that contract spontaneously are _______________
smooth muscle
_____________ surrounds each muscle fasciculus, whereas _________________ surrounds each muscle fiber
perimysium; endomysium
Each muscle cell is a _________________
fiber
The muscle cytoplasm is also known as the ________________
sarcoplasmic reticulum
Which of these units contains overlapping myosin and dark myofilaments?
A Band
Which of the following is NOT a function of a muscle?
filtering wastes
Which of the below muscles is voluntarily controlled?
quadriceps in legs
Muscle cells that are striated; involuntary; branches w/ central nucleus, lots of mitochondria; separated by intercalated disks are _______________
cardiac
Which of the following structures connect bone to muscle?
tendon
Which of the following molecules is not a necessary component for the "sliding filament theory"?
carbon dioxide
Which muscle fibers are representative of marathon runners?
slow-twitch
Which muscle fibers have little myoglobin and used in powerful bursts of movement?
fast-twitch