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Yes, calcium is necessary for the release of neurotransmitters that cause a muscle to initiate a contraction. Calcium is also needed to bind to the troponin-tropomyosin complex causing it to change position so the myosin head can attach to the actin molecule which results in contraction.
Wiki User
∙ 11y ago
Wiki User
∙ 11y agoCalcium binds to the troponin-tropomyosin complex causing it to change position exposing the myosin binding site on the actin molecule.
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What is the role of calcium ions in muscle contraction?
They bind to regulatory sites on troponin to remove contraction inhibition
What period is characterized by calcium ions release into cytosol and depolarization of the sarcolemma and T tubules?
The period that would be characterized by those things would be muscle contraction. Calcium ions are the neurotransmitters that cause contraction. Calcium Ions depolarize the cell and are spread through out the muscle via the T tubules.
Normally stored in the terminal cisternae of the sarcoplasmic reticulum?
One major function of the sarcoplasmic reticulum is the regulate the intracellular levels of CA2+ for contractions and relaxation for muscles. Sarcoplasmic Reticulum is a storage organelle with calcium ion pumps on membrane and use ATP to fuel pumps to get calcium ion inside it's cell and holds it. When contraction of muscle is needed calcium ion is then dumped into cytoplasm to cause contraction.
Does a skeletal muscle fiber contain many nuclei?
Skeletal muscle fibers contain numerous nuclei. This is used to produce large amounts of the enzymes and structural proteins needed for muscle contraction.
What is needed besides calcium for contraction to occur?
An action potential. It is the nerve impulse that enters into sarcomeres from the sarcoplasmic reticulum and provides the energy for the calcium ions to briefly bind to the troponin on the actin myofilament to allow for contraction to occur by bringing the Z-lines closer together.
What minerals are needed for normal muscle contraction?
Calcium
What minerals are needed for muscle contraction and conduction of nerve impulses?
phosphorous.
Where is calcium stored in a relaxed skeletal muscle?
yes calcium is stored in muscles as it is necessary for muscle contraction and muscle contraction is very sensitive to the amount of calcium
Are ATP and calcium both needed for muscle contraction to occur?
look in ur freaken book loser.
What is an important ion for muscle contraction?
calcium
During muscle contraction calcium attaches to what?
Troponin
What ion is essential for a muscle contraction to occur?
Calcium binding to actin-myosin causes contraction. The calcium is released to the sarcomere from a specialized storage organelle, the sarcoplasmic reticulum.
What is the role of calcium ions in muscle contraction?
They bind to regulatory sites on troponin to remove contraction inhibition
The mechanism of contraction in smooth muscle is different from skeletal muscle in that?
The site of calcium regulation differs
What is the ion necessary in cross bridging to produce a muscle contraction is?
calcium
what is calcium healthy for?
Calcium is necessary for strong bones and teeth but also a key component in muscle contraction.
Role of ionic calcium in muscle contraction?
triggers neurotransmitter secretion, removes contraction inhibitor, and binds with troponin.
