Addiction and neural ageing
Addiction and neural ageing

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Glossary


Glossary for SD805_2
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V

valency

The number of covalent single bonds that an atom can make. For example, from the formula of methane, CH4, a carbon atom can be seen to have a valency of 4.


varicosity

(neural) A nodule on an axonal branch which contributes to the postsynaptic influence of the neuron by releasing large quantities of transmitter. This type of synapse is characteristic of neurons projecting to the striatum from the substantia nigra.


venous cannula

A tube passing into a vein through which a drug can be passed into the body.


very low density lipoproteins (VLDL)

Molecular aggregates of lipids and proteins. VLDL are formed in the liver. They contain much less protein than lipid.


viability

The probability that a fertilized egg will go on to develop into an individual that can reproduce.



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