NesmineDoompos1 NesmineDoompos1
  • 16-12-2015
  • Biology
contestada

Each muscle fiber contains tiny threads called _____, which are made of myosin and actin.
ligaments
myofibrils
myoactin
ATP

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MonikaMole1421
MonikaMole1421 MonikaMole1421
  • 19-12-2015
Myofibrils are the building blocks or contractile unit of each muscle fiber. The tiniest functional unit of skeletal muscle, the sarcomere, is found in the myofibrils and is made up of protein filaments: actin (thin) and myosin (thick).
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nathantullis nathantullis
  • 09-11-2021

Answer:

myofibrils

Explanation:

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