Calcium is used in many processes including muscle contraction, neurotransmitter release from nerve endings and cell migration.

Calcium is removed from the muscle cell cytoplasm independent of repolarization ( depolarization signaling and muscle contraction are independent processes ).

Calcium can bind to several different calcium-modulated proteins such as troponin-C ( the first one to be identified ) and calmodulin, proteins that are necessary for promoting contraction in muscle.

Calcium ions are responsible for many important physiological functions, such as in muscle contraction.

Three grams of Calcium beta-hydroxy-beta-methylbutyrate per day may help muscles combat protein breakdown, assist in muscle repair and support increased endurance.

Calcium salts are colorless from any contribution of the calcium, and ionic solutions of calcium ( Ca < sup > 2 +</ sup >) are colorless as well.

Calcium ( from Latin, genitive calcis, meaning " lime ") was known as early as the first century when the Ancient Romans prepared lime as calcium oxide.

The Calcium carbonate, from which coral skeletons are made is just over 60 % Carbon dioxide.

Calcium aluminate cements are hydraulic cements made primarily from limestone and bauxite.

Calcium sulfoaluminate cements are made from clinkers that include ye ' elimite ( Ca < sub > 4 </ sub >( AlO < sub > 2 </ sub >)< sub > 6 </ sub > SO < sub > 4 </ sub > or C < sub > 4 </ sub > A < sub > 3 </ sub > in Cement chemist's notation ) as a primary phase.

Calcium is available from hard leafy greens, nuts and seeds.

Calcium released by basalts binds up CO < sub > 2 </ sub > from the atmosphere forming CaCO < sub > 3 </ sub > acting thus as a CO < sub > 2 </ sub > trap.

When the cement paste exposed to the air and meteoric water reacts with the atmospheric CO < sub > 2 </ sub >, portlandite and the Calcium Silicate Hydrate ( CSH ) of the hardened cement paste become progressively carbonated and the high pH gradually decreases from 13. 5 – 12. 5 to 8. 5, the pH of water in equilibrium with calcite ( calcium carbonate ) and the steel is no longer passivated.

Calcium carbonate, long used as the coating of paper, was now being used as an important filler as the paper industry converted from acid-based paper making systems to alkaline systems.

Calcium carbonate is used as the source of CO < sub > 2 </ sub > and the resultant calcium oxide is used to recover the ammonia from the ammonium chloride.

Calcium is released from the sarcoplasmic reticulum into the sarcomere when a muscle is stimulated to contract.

Calcium mediates the binding of the complexes via the terminal gamma-carboxy residues on FXa and FIXa to the phospholipid surfaces expressed by platelets, as well as procoagulant microparticles or microvesicles shed from them.

Calcium sulfonates additives are also added to protect motor oil from oxidative breakdown and to prevent the formation of sludge and varnish deposits.

In 1959, the Indian River Central High School ( New York ) opened, serving students from the towns of Philadelphia, Theresa, Antwerp, Leray, Pamelia, the villages of Philadelphia, Theresa, Antwerp, Evans Mills, the hamlet of Calcium and the federal military installation of Fort Drum.

Calcium triggers release of the luciferin ( coelenterazine ) from the luciferin binding protein.

Calcium ions, Ca < sup > 2 +</ sup >, are released from bone into the bloodstream under controlled conditions.

Calcium also causes the release of Acetylcholine from Pre-synaptic terminal in the transmission of nerve impulse.

Calcium release from bone is regulated by parathyroid hormone.

Calcium influx from NMDA receptors is necessary for the activation of CaMKII.

Calcium can be injected into selected arteries to stimulate insulin release from various parts of the pancreas, which can be measured by sampling blood from their respective veins.

In 2004, Meade acquired Coronado Filters from founder and designer David Lunt, who produce an extensive range of specialty telescopes that allow views of the sun in Hydrogen-Alpha, and formerly, at Calcium K line wavelengths.

Calcium ions bind to troponin C, causing a conformational change in the troponin-tropomyosin complex, and thus allowing myosin head binding sites on F-Actin to be exposed.

Calcium has been added to over-the-counter products, which contributes to inadvertent excessive intake.

Calcium also has a cosmogenic isotope, radioactive < sup > 41 </ sup > Ca, which has a half-life of 103, 000 years.

Calcium phosphide is often used in naval flares, as in contact with water it liberates phosphine which self-ignites in contact with air ; it is often used together with calcium carbide which releases acetylene.

Calcium carbonate has two forms, the stable calcite, and the metastable aragonite, which is stable within a reasonable range of chemical environments but rapidly becomes unstable outside this range.

Calcium and Magnesium will be lacking in coir potting mixes, so a naturally good source of these nutrients is dolomitic lime which contains both.

The phosphorylation events lead to a decrease in intracelluar calcium ( inhibit L type Calcium channels, inhibits IP3 receptor channels, stimulates sarcoplasmic reticulum Calcium pump ATPase ), a decrease in the 20kd myosin light chain phosphorylation by altering calcium sensitization and increasing myosin light chain phosphatase activity, a stimulation of calcium sensitive potassium channels which hyperpolarize the cell, and the phosphorylation of amino acid residue serine 16 on the small heat shock protein ( hsp20 ) by Protein Kinases A and G. The phosphorylation of hsp20 appears to alter actin and focal adhesion dynamics and actin-myosin interaction, and recent evidence indicates that hsp20 binding to 14-3-3 protein is involved in this process.

Calcium carbide reacts with water to produce acetylene, which acts as an artificial ripening agent.

The Calcium Kid is a British mockumentary comedy film which was released in 2004.

Calcium metabolism or calcium homeostasis is the mechanism by which the body maintains adequate calcium levels.

Calcium ions bind with troponin-C molecules ( which are dispersed throughout the tropomyosin protein ) and alter the structure of the tropomyosin, forcing it to reveal the cross bridge binding site on the actin.

Calcium ion entry into the presynaptic terminal causes the presynaptic release of glutamate which diffuses across the synaptic cleft binding to glutamate receptors on the postsynaptic membrane.

One such mechanism to detect low calcium concentration has been illustrated by the lcrV ( Low Calcium Response ) antigen utilized by Yersinia pestis, which is used to detect low calcium concentrations and elicits T3SS attachment.

Calcium is omitted, but can be added to deal with situations in which it plays a significant role.

Calcium, which plays many roles in the cell and is tightly regulated, disrupts the membrane when it appears in excess.

Calcium ( calcium chloride or calcium gluconate ) increases threshold potential through a mechanism that is still unclear, thus restoring normal gradient between threshold potential and resting membrane potential, which is elevated abnormally in hyperkalemia.

He described his findings in a paper entitled The Stationary H-and K-lines of Calcium in Stellar Atmosphere which he submitted to the Nature magazine in 1921.

## Calcium activates nitric oxide synthase which produces nitric oxide

Calcium cations from hard water can also combine with soap, which would dissolve in soft water.

There is also a fossa ovalis in the interatrial septum, which is used in the fetal period as a means of bypassing the lung. The atrium is depolarized by Calcium.

Her film credits include The Calcium Kid with Orlando Bloom and Tooth ( in which she played an ancient fairy ), both in 2004.