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There are 4 glossary search results for:   calcium




Abbreviation:
Ca2+

Definition:
Calcium (Ca2+) is a divalent cation. It plays an important role in physiological processes such as muscle contraction and synaptic transmission. Calcium is also an intracellular messenger.

The extracellular concentration of Ca2+ is about 2 mM. The intracellular concentration of Ca2+ is about 70 nM.



Definition:
A total plasma calcium level that is greater than the normal range of 2.2 - 2.6 mM (9 - 10.5 mg/dL). The free calcium concentration in the plasma is approximately 1.5 mM (6 mg/dL), and the remaining amount is bound to plasma proteins.

Related glossary terms/phrases:
Hypocalcemia



Definition:
A total plasma calcium level that is less than the normal range of 2.2 - 2.6 mM (9 - 10.5 mg/dL). The free calcium concentration in the plasma is approximately 1.5 mM (6 mg/dL), and the remaining amount is bound to plasma proteins.

Related glossary terms/phrases:
Hypercalcemia



Definition:
Neurotoxins are chemical molecules that have an adverse effect on neuron function and, thus, disrupt the normal function of the nervous system. Neurotoxins could be small molecules or peptides and can be derived from a variety of invertebrate and vertebrate animals, as well as plant species.

The following is a short list of some examples of neurotoxins:

α-Bungarotoxin: A peptide neurotoxin that inhibits the nicotinic acetylcholine receptor.

Chlorotoxin: A peptide neurotoxin that inhibits chloride channels.

α-Conotoxin: A peptide neurotoxin that inhibits the nicotinic acetylcholine receptor.

δ-Conotoxin: A peptide neurotoxin that inhibits voltage-gated sodium channels.

w-Conotoxin: A peptide neurotoxin that inhibits N-type voltage-gated calcium channels.

Picrotoxin: Inhibits GABAA receptor chloride channels.

Tetrodotoxin: Inhibitor of neuronal voltage-gated sodium channels.









Posted: Sunday, March 31, 2013
Last updated: Friday, August 28, 2015