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WorksheetsMuscle Fibers
Total questions: 12
Worksheet time: 6mins
The motor unit consists of muscle fibers and
motor unit
motor neuron
synapse cleft
sarcomere
What substance provides the energy for muscle contraction?
ATP
Calcium
Acetylcholine
Actin
What are the two filaments found in muscle?
Actin
Sarcomere
Fiber
Myosin
Myofilament
N
Muscle Fiber
Nuceli
Myofibril
Actin
R
Muscle Band
Fasciculus
Myofibril
Z Band
Y
Myofilament
Muscle Belly
Sarcomere
Sarcoplasm
A
Sarcolemma
A Band
I Band
Sarcomere
E
I Band
A Band
Muscle Fiber
Nucleus
C
Muscle Fiber
Z Line
I Band
A Band
Contractile unit of a muscle
Myofilament
Muscle cells
Tendon
Sarcomere
Energy used for long duration exercise
Creatine Phosphate
Anaerobic Glycolysis
Aerobic Respiration
The LAST step of muscle contraction
Acetylcholine crosses the synaptic cleft
The action potential causes calcium ions to be released
Myosin head attaches to actin active sites and the sarcomere shortens
Calcium ions expose active sites on actin filaments
