Addiction and neural ageing
Addiction and neural ageing

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Glossary


Glossary for SD805_2
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5

5-HT

5-hydroxytryptamine (serotonin). Biologically active amine occurring as a hormone in plants and as both a hormone and a neurotransmitter in animals. Like acetylcholine, adrenalin and noradrenalin, serotonin acts on many organs of the body, either directly or by a neuronal reflex.


‘nothing but’

The idea that something is nothing but its component parts and can be explained simply in terms of them, e.g. that humans are ‘nothing but’ a collection of physical components.


Β

β-amyloid

Also referred to as amyloid-

β (abbreviated to Aβ). It is a peptide derived from the larger amyloid precursor protein (APP) and is the principal component of amyloid fibrils. The specific role of β-amyloid is unclear, but it is thought that amyloid deposits may cause neurons to degenerate. Amyloid deposits also occur in the brains of older Down’s syndrome patients.


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