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WorksheetsCh. 6 Muscular System Review
Total questions: 11
Worksheet time: 8mins
triggers the uncovering of the myosin binding sites on actin
What ions free the actin strands and allow muscle contraction to occur?
POTASSIUM
CALCIUM
SODIUM
The contractile unit of a myofibril consisting of Z-lines, A-bands, and I-bands.
A BANDS
Z LINES
SARCOMERES
SARCOLEMMA
point of contact between a motor neuron and a skeletal muscle cell
I band
neuromuscular junction
Sarcoplasmic reticulum
Epimysium
Neurotransmitter that produces an impulse in a muscle cell
serotnoin
dopamine
epinephrine
acetylcholine
What two proteins prevent the myosin heads from binding to the actin strands?
troponin
globulins
tropomyosin
fibrin
When Acetylcholine binds to the channels ____ ions will enter the muscle cell and ____ ions will leave the muscle cell
Na; K
K; Na
Na; Ca
Ca; Na
