Calcium ion channel

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[[Calcium|Calcium]] ion (Ca<sup>2+</sup>) channels are [[Protein|protein]] channels are only permeable to Ca<sup>2+</sup>. [[Calcium_ion_channel|Calciuim ion channels]] are mainly found in the membrane of cells and organelles such as the [[Sarcoplasmic reticulum|sarcoplasmic reticulum]], [[Phospholipid_bilayer|phospholipid bilayer]] of the cell surface membrane and many more. There are many types of calcium ion channels that exist in [[Eukaryotic Cell|eukaryotic]] and [[Prokaryotic|prokaryotic]] cells. There are the voltage-gated ion channels and ligand-gated ion channels<ref>Alberts, B., Johnson, K., Lewis, J, Raff, M., Roberts, K.. Walter, P (2008). Molecular Biology of the Cell, Fifth Edition, New York: Garland Science. 912-913</ref>.  
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[[Calcium|Calcium]] ion (Ca<sup>2+</sup>) channels are [[Protein|protein]] channels are only permeable to Ca<sup>2+</sup>. Calciuim ion channels are mainly found in the membrane of cells and organelles such as the [[Sarcoplasmic reticulum|sarcoplasmic reticulum]], [[Phospholipid bilayer|phospholipid bilayer]] of the cell surface membrane and many more. There are many types of calcium ion channels that exist in [[Eukaryotic Cell|eukaryotic]] and [[Prokaryotic|prokaryotic]] cells. There are the voltage-gated ion channels and ligand-gated ion channels<ref>Alberts, B., Johnson, K., Lewis, J, Raff, M., Roberts, K.. Walter, P (2008). Molecular Biology of the Cell, Fifth Edition, New York: Garland Science. 912-913</ref>.  
  
Voltage-gated calcium ion channels play an important role in [[Synaptic_transmission|synaptic transmission]]; They allow calcium ions to diffuse into the axon terminal of a neurone, which stimulates the [[Exocytosis|exocytosis]] of [[Acetylcholine|acetylcholine]] (neurotransmitter)&nbsp;into the synaptic cleft, allowing&nbsp; for [[Depolarisation|depolarisation]] of the postsynaptic cell membrane (passing on the [[Action potential|action potential]])<br>  
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Voltage-gated calcium ion channels play an important role in [[Synaptic transmission|synaptic transmission]]; They allow calcium ions to diffuse into the axon terminal of a neurone, which stimulates the [[Exocytosis|exocytosis]] of [[Acetylcholine|acetylcholine]] (neurotransmitter)&nbsp;into the synaptic cleft, allowing&nbsp; for [[Depolarisation|depolarisation]] of the postsynaptic cell membrane (passing on the [[Action potential|action potential]])<br>  
  
 
=== References<br>  ===
 
=== References<br>  ===
  
 
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Latest revision as of 09:02, 6 December 2017

Calcium ion (Ca2+) channels are protein channels are only permeable to Ca2+. Calciuim ion channels are mainly found in the membrane of cells and organelles such as the sarcoplasmic reticulum, phospholipid bilayer of the cell surface membrane and many more. There are many types of calcium ion channels that exist in eukaryotic and prokaryotic cells. There are the voltage-gated ion channels and ligand-gated ion channels[1].

Voltage-gated calcium ion channels play an important role in synaptic transmission; They allow calcium ions to diffuse into the axon terminal of a neurone, which stimulates the exocytosis of acetylcholine (neurotransmitter) into the synaptic cleft, allowing  for depolarisation of the postsynaptic cell membrane (passing on the action potential)

References

  1. Alberts, B., Johnson, K., Lewis, J, Raff, M., Roberts, K.. Walter, P (2008). Molecular Biology of the Cell, Fifth Edition, New York: Garland Science. 912-913
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