The phrase "activated by system" is correct and usable in written English.
It can be used in contexts where you are describing a process or function that is triggered or initiated by a system.
Example: "The alarm will be activated by the system if any unauthorized access is detected."
Alternatives: "triggered by the system" or "initiated by the system".
The stress system activated by the immune system thus stimulates a negative feedback mechanism that protects the organism from an excess of inflammatory proteins.
The r-RST predicts that the nervous system regulates personality and that behaviour is dependent upon the activation of the behavioural activation system (BAS), activated by reward cues and the fight-flight-freeze system (FFFS), activated by punishment cues.
The scientists found that LSD1 is produced in B cells when they are activated by the immune system, and is required to encode the genetic programming that enables B cells to form germinal centers.
Moreover, this enzyme can be activated by the plasminogen system (Benbow et al, 1999).
Several pathways have been shown to be activated by RANKL/RANK-signaling system.
Peroxidase (spot G63) is a homolog of Euphorbia latex peroxidase, a calmodulin (CaM -binding protein aCaM -bindingthe Ca2+/CaM system.
On the contrary, the response may be a sign of the maximal response of a normal kidney activated by the sympathetic system and subjected to vasopressin.
Additional downregulated factors potentially activated by the PPARG/RXRA/RAR system included ELF3, TBX2 and TBX3 [ 22, 38, 39].
Ephrins are proposed to interact functionally with, and become activated by, other signalling systems (Arvanitis and Davy, 2008; Kullander and Klein, 2002).
Switching to a system activated by an ID card, he said, is an extension of the access control systems used for airport doorways, where keys would also not be practical because they can easily be lost or copied.
