ISSA Bodybuilding Week 1-A Exam
Questions With Verified Answers
Muscle - answer✔A group of motor units physically seperated by a membrane from other
groups of motor units
Smooth muscle - answer✔Governed by the autonomic nervous system and includes the
muscles that line the digestive tract and protect blood vessels
Cardiac muscle - answer✔Which includes the heart, as smooth muscle is modulated by the
autonomic nervous syste
Skeletal muscle - answer✔Blends tendinous insertions that attach to bones pulling on them,
which generates desired movement
Motor unit - answer✔Consists of a single neuron and all the muscle fibers innervated by it
Myofibrils - answer✔Small bundles of myofilaments
Myofilaments - answer✔The elements of the muscle that shorten upon contraction
Myosin - answer✔Short thick filaments that make up part of myofilaments
Actin - answer✔Long thin filaments that make up part of myofilaments
Reciprocal innervation - answer✔When a prime mover muscle or group of muscles contracts
the opposing muscle or group relaxes
Sliding filament theory - answer✔States that a myofibril contracts by the actin and myosin
filaments sliding over each other, chemical bonds and receptor sites on the myo filaments
attract each other to be held until fatigue interferes
Parallel muscle - answer✔Fascicles parallel to longitudinal axis of muscle, terminate at either
end in flat tendons
Fusiform muscle - answer✔Fascicles nearly parallel to longitudinal axis of muscle, terminate in
flat tendons, muscle tapers toward tendons where diameter is less that at the belly
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