dependence

Synapse

...omenon that gives rise to the so-called frequency dependence of synapses. The nervous system exploits this property for computational purposes, and apparently tunes its synapses through such means as phosphorylation of the proteins involved. The size, number and replenishment rate of vesicles also are subje...

Symbiosis

...based on co-operation , interaction , and mutual dependence among organisms. According to Margulis and Sagan (1986), "Life did not take over the globe by combat, but by networking". As in humans, organisms that cooperate with others of their own or different species often outcompete those that don't. Howev...

Muscle

...ed. It leads to progressive loss of strength, high dependence and decreased life span. Inflammatory muscle disorders: Polymyalgia rheumatica (or "muscle rheumatism") is an inflammatory condition that mainly occurs in the elderly; it is associated with giant-cell arteritis . It often responds dramatically...

Marine biology

...metimes considered marine mammals because of their dependence on the sea. In the USA they are protected under marine mammal protection laws. Reefs Reefs comprise some of the densest bio habitats in the world as far as number of species within a given area. They can be incredibly diverse. Even cold water ...

Endosymbiotic theory

...er organisms. This is consistent with an increased dependence on the eukaryotic host after forming an endosymbiosis. Chloroplasts appear in very different groups of protists , which are in general more closely related to forms lacking them than to each other. This suggests that if chloroplasts originated as...

Barbiturate

...tolerance , physical dependence, and psychological dependence to barbiturates. With the development of tolerance, the margin of safety between the effective dose and the lethal dose becomes very narrow. That is, in order to obtain the same level of intoxication, the tolerant abuser may raise his or her dose to ...