Calcium ions increase the speed of the action potential transmitted along the

Calcium ions increase the speed of the action

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Why are calcium ions necessary for skeletal muscle contraction? Calcium ions increase the speed of the action potential transmitted along the sarcolemma Calcium ions trigger the binding of myosin heads to actin filaments calcium ions cause ATP binding to actin
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Calcium ions release the inhibition Z discs Question 8 1 / 1 pts WHich of these events must occur first to trigger the skeletal muscle to generate an action potential and contract? Sodium ions rush into the cell Acetylcholine (ACH) binds to recerptors on the sarcolemma and allows passage of sodium ions into the cell Acetylcholinesterase breaks down ACh Potassium ions rush into the muscle cell Question 9 1 / 1 pts What enzyme breaks down acetylcholine into acetic acid and choline to prevent continued contraction of the muscle fiber? potassium ions lactase acetylcholinesterase mysoniase Question 10 1 / 1 pts WHich type of muscle tissue contracts most quickly upon stimulation? skeletal visceral cardiac smooth
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Question 11 1 / 1 pts One neuron and all the skeletal muscles it stimulates is known as a(n) osteon sarcomere neuromuscular junction motor unit Question 12 1 / 1 pts What organelle wraps and surrounds the myofibril and stores calcium cross bridge sarcolemma
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  • Spring '08
  • Cuff-alvar

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