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Human A&P
Muscle System
Question | Answer |
---|---|
A fibrous, flattened, sheet-like tendon is known as | aponeurosis |
The connective tissue that surrounds individual muscle fibers is | endomysium |
skeletal muscle cells contain many | mitochondria and nuclei |
The dark bands in skeletal muscle that contribute to its striated appearance are known as | A band |
The segment of a muscle fiber that contains both actin and myosin is the | A band |
The sarcomere, the base unit of skeletal muscle extends from | Z line to Z line |
When the cross-bridge of the myosin molecule forms linkages with actin filaments, the result is | shortening of the muscle fiber |
ATPase is stored in | the globular portion of the myosin filament |
when a nerve impulse reaches the end of a motor neuron | acetylcholine is released |
The toxin of clostridium botulinum causes death by | preventing the release of acetylcholine |
During high intensity exercise, muscle fibers rely upon what process for energy? | anaerobic respiration |
Oxygen debt secondary to strenuous exercise is due to? | insufficient oxygen to promote conversion of lactic acid to glucose and lack of available oxygen to convert ADP to ATP |
the strength of a muscle in response to different levels of stimulation is determined by the | number of motor units receiving a threshold stimulus |
the result of summation and recruitment together is | sustained tetanic contraction |
muscle tone refers to | a state of sustained, partial contraction of muscles that is necessary to maintain posture |
peristalis is due to which of the following characteristics of smooth muscle | rhythmicity |
muscles that assist the prime mover is producing a movement are called | synergirsts |
Antagonistic muscles | preform functions opposite to those performed by the prime mover |
Muscles that are involved in chewing are attached to the | mandible |
The primary extensors of the upper are are the | teres major and latissimus dorsi |
the muscle that abducts the upper arm and can both flex and extend the humerus is the | deltoid |
which of the following muscles produce plantar flexion | gastrocnemius |