The phrase "activated by the second" is correct and usable in written English.
It can be used in contexts where something is triggered or initiated at a specific moment or interval, often in technical or scientific discussions.
Example: "The device is designed to be activated by the second, ensuring precise timing for each operation."
Alternatives: "triggered every second" or "initiated per second".
Inositol trisphosphate receptor (IP3R) is a membrane glycoprotein complex acting as Ca2+ release channel activated by the second messenger inositol trisphosphate (IP3).
The MSb1 is activated by the second subsystem and the MSb2 is totally inhibited by the first subsystem when this one reaches a determinate threshold value (figure 1).
The catalytic dissipative element MSb1 is activated by the second MSb, with q1,1 = 0.18, q1,2 = 0.02, q1,3 = 0.15 and the MSb2 is totally inhibited by MSb1, with a threshold δ = 0.1.
The PKA pathway is activated by the second messenger cAMP which in turn leads to the phosphorylation of the Cre-binding protein (CREB) and modulation of transcription of downstream genes [22], [23].
The metabolic subsystem MSb1 receives an outer input flux of substrate and is activated by the second subsystem (in the MSb2 there is an allosteric enzyme of positive modulation).
In the context of our model proposed here this would imply that the inhibition imposed on these 6 'losers' by units activated by the second AM tone could not be blocked completely, but nevertheless – and in contrast to control conditions - they maintained responses to their BP when the competing AM tone had fm in the vicinity of their AM receptive fields.
Since this cortical zone was more strongly activated by the first level of coherence (collinear stimuli), but less active in response to meaningful stimuli, we could potentially discern top-down effects that result in an increase in activity (with collinearity as a modulatory effect) and effects that result in a decrease in activity (with meaning as a modulatory effect).
HrpL is then able to activate the other proteins of the regulon and the system reaches a steady state with all proteins, except HrpV activated by the third step.
We found that the fibrinogen-like globe of tenascin-C activates TLR4 (Midwood et al., 2009), whereas α9-integrin was activated by the third fibronectin type III-like repeat of tenascin-C (Kanayama et al., 2011).
P-Rex is substantially activated by the lipid second messenger PtdIns 3,4,5 P3, which is generated by the activity of phosphoinositide 3-kinase (PI3K), suggesting that PtdIns 3,4,5 P3 may be an upstream trigger for enhancing Rac activity.
Out of twelve PKC isoforms so far identified, nine are activated by the lipid second messenger DAG, and this implies that altered DAG-PKC pathway may have an important role in diabetic complications [ 61].
