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WorksheetsMuscle Parts Label
Total questions: 4
Worksheet time: 3mins
Label the parts of thick and thin filaments in skeletal muscle.
"C" = portion of a thin filament
"B" = myosin molecule
"E" = actin
"A" = portion of a thick filament
"A" = tropomyosin
Label the parts of the neuromuscular junction.
axon terminal of motor neuron = A
synaptic vesicle = B
synaptic cleft = C
ACh = D
Label the steps in excitation-contraction coupling in skeletal muscle.
A= Action potential is propagated along the sarcolemma and down the T tubules.
B= The SR is stimulated to release calcium ions.
C= Calcium binds to troponin and removes the blocking action of tropomyosin.
D = Cross bridge formation occurs and the contraction mechanism is initiated.
Label the steps of the cross bridge cycle in skeletal muscle.
C= cross bridge detachment
B= the power stroke or working stroke
A = cross bridge formation
D = cocking of myosin head
