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When a nerve signals a muscle to contract where is calcium released?
Wiki User
∙ 12y ago
calcium released by sarcoplasmic reticulum.
Wiki User
∙ 12y ago
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The ability of a muscle to contract and relax is dependent on the flow of what?
The ability of a muscle to contract and relax is dependent on the flow of calcium in and out of the muscle cell. Poor maternal intake of calcium increases the risk of hypertension in the adult offspring.
How are muscle cells suited to their function?
Muscle cells are specialized to contract and relax. They have several unique protein molecules (actin, myosin, etc.) that interlock and are responsive to the local concentration of calcium. When calcium levels go up (calcium is released from the modified SER), the muscle proteins contract. When the calcium levels go down (calcium is pumped back into the modified SER), the muscle proteins relax.
Chemical a binds and blocks acetylcholine receptors of muscle cells chemical b floods the cytoplasm of muscle cells with calcium ions which would make the best muscle relaxant and why?
Chemical A, because if the cytoplasm is flooded with calcium, then the actin and myosin would slide into eachother, causing the muscle to contract.
What Major function is to contract?
muscle tissue
What tells muscles when to contract?
A Nerve cell tells a muscle when to contract.
What is the purpose of the sarcomere?
To contract when calcium ions are released into the muscle cell cytoplams.
What would happen to a muscle's ability to contract if calcium levels within the muscle were low?
Muscles cannot contract without calcium
What is the function of the calcium in the sarcoplasm?
Calcium is released from the sarcoplasm to bind with the troponin which allows the tropomyosin the reveal the binding sites on the actin so the muscle can contract
How does heart rate counters work?
These work by picking up electrical signals that are released when the heart muscle cells contract.
The ability of a muscle to contract and relax is dependent on the flow of what?
The ability of a muscle to contract and relax is dependent on the flow of calcium in and out of the muscle cell. Poor maternal intake of calcium increases the risk of hypertension in the adult offspring.
Is calcium a fiber?
No. Calcium does have a major role in muscle fibers when your muscles contract, but it is not the actual fiber.
What channels open when the nervous system signals a muscle to contract?
sodium ion
Does glycerinated skeletal muscle fibers need calcium in order to contract?
false
When the nervous system signals a muscle to contract what ion channels open?
sodium ion
When the nervous system signals a muscle to contract the ion channels open?
sodium ion
What are contract muscles?
Smooth Muscle contractions are regulated by calcium ions. The smooth muscle differs from skeletal muscle in that its contracts from all sides.
Is calcium useful to humans?
Actually, calcium is a vital macronutrient that must be consumed on a fairly regular basis to maintain life. While most people know that calcium helps build strong bones (it is one of the two major elements in the rigid bone matrix), calcium is also vital for proper heart muscle function. The correct level of calcium in the blood maintains the correct reactivity for the heart to contract, which does so when a flood of calcium is released inside the heart muscle cells. Without calcium, the heart would not be able to contract and a person would die.
