The phrase "activated by external" is correct and usable in written English.
It can be used in contexts where something is triggered or initiated by outside factors or influences.
Example: "The alarm system is activated by external sensors that detect movement."
Alternatives: "triggered by outside" or "initiated by external factors".
The pump, which has adenosine-triphosphatase (ATPase) activity, traverses the cell membrane and is activated by external [K+] and internal [Na+].
The reason for the lack of effect of peripheral A-803467 administration on MIA-induced spontaneous activity could be that articular Nav1.8 channels are only activated by external physical stimuli and are unaffected by the sensitizing effect of algogenic agents present in the diseased joint.
Bound to a cell membrane, Na+-K+ ATPase is activated by external potassium and internal sodium.
Fluorophore-tagged CadC was detectable as distinct cluster only when the receptor was activated by external stress, which results in DNA-binding.
Despite the extended debates in the last decade about depression's causes, it seems fairly clear that it is usually the consequence of a genetic vulnerability activated by external stress.
Innovative, reversible joints, collectively activated by external trigger signals, form a promising approach to low cost, mass disassembly in this context.
The powers of the soul for example, memory or intellect are active potentialities; once activated by an external agent they bring about their own actualities by way of their operations for example, understanding in the case of the intellect.
It postulated the existence of two transcriptional factors, respectively an activator and a repressor, whose phosphorylated forms are activated by an external signal, allowing them to act on the promoter of a gene involved in the formation of LTM (e.g. the creb genes).
We also introduced an external intervention term in original DDE to explore its new feature of dynamic evolution probably activated by an external intervention.
When activated by an external force, integrins cluster together on a cell's surface and join other proteins to form structures called focal adhesions.
Unlike the Montana's, the eXplorist's camera can be activated by an external weather-sealed button rather than through a series of awkward menus.
