Dictionary > Nassa


Nassa may pertain to the gastropod genus Nassa of the taxonomic family Muricidae, class Gastropoda, phylum Mollusca. Nassa may also pertain to noradrenergic and specific serotonergic antidepressants (NaSSas), which belong to a class of psychiatric drugs. They antagonize the α2-adrenergic receptor and some serotonin receptors (e.g. 5-HT2A and 5-HT2C). Thus, they block α2-adrenergic autoreceptors and heteroceptors, and stimulate adrenergic and serotonergic neurotransmission involved in mood regulation.


  1. Julien, R. M. (2004). A Primer Of Drug Action: A Comprehensive Guide To The Actions, Uses, And Side Effects Of Psychoactive Drugs. Macmillan. p. 286.

© Biology Online. Content provided and moderated by Biology Online Editors

You will also like...

Digestion and Absorption of Food
Digestion and Absorption of Food

The gastrointestinal system breaks down particles of ingested food into molecular forms by enzymes through digestion and..

Wart-like leaf galls on grape leaves
Plant Cell Defense

Plants protect themselves by releasing hydrogen peroxide to fight against fungal invasion. Another way is by secreting c..

Water in Plants

The movement of molecules (specifically, water and solutes) is vital to the understanding of plant processes. This tuto..

IQ, Creativity and Learning
IQ, Creativity and Learning

Human intelligence provided the means to utilize abstract ideas and implement reasoning. This tutorial takes a further l..

Cell Biology
Cell Biology

The cell is defined as the fundamental, functional unit of life. Some organisms are comprised of only one cell whereas o..

Homeostasis by water regulation
Homeostasis of Organism Water Regulation

Osmoregulation is the regulation of water concentrations in the bloodstream, effectively controlling the amount of water..