Absolute plasma CgA levels may also help to differentiate between localised and diffuse NET spread, as well as between chronic active gastritis and NETs (Campana et al, 2007).
The other branch from this area of convergence extends towards the midline, forming a diffuse net of decussations before it extends posteriorly towards the 5HT-ir domain of an unpaired midline structure in the center of the protocerebrum (sd2; Figure 5D).
According to Parker the nervous systems in coelenterates (cnidarians + ctenophores) form diffuse nerve nets that are not centralized; signal transmission is diffusely spread through the animal's body.
Thus, the expansion of HS 3- O-sulfotransferase genes occurs concomitantly with the transition of diffuse nerve nets to more complex nervous systems.
Here, it is shown that small molecules with positive net-charge can diffuse into the negatively charged spider silk protein matrix driven by electrostatic interactions.
Because this could lead to a thinner heliosheath, the ENA flux could be reduced but because the heat flux causes the energetic ionized particles to diffuse to greater distances; the net effect may be that there is little change in the overall ENA fluxes.
The diffuse nerve net of coelenterates coalesces into definite tracts or bundles, which run posteriorly from the anterior brain to innervate the structures of locomotion.
The common ancestor had a diffuse neural net, they claimed, and the central nervous system must have developed after the two lineages split.
Habituation occurs even in animals without a central nervous system probably in single-celled protozoans; certainly in animals such as the coelenterate Hydra, which have a diffuse nerve net and do not appear to be capable of associative learning.
The unexpected complexity of man's ancestor raises some troubling questions for evolutionary biology.Within the animal kingdom, the simplest and most evolutionarily ancient type of nervous system is a diffuse neural net, in which one type of nerve cell, mediating both sensation and movement, is spread throughout an organism.
