One year later, the Skynet system is activated, begins to perceive humans as a threat, and eradicates much of humanity with nuclear weapons in the "Judgment Day" event.
When B cells and T cells are activated and begin to replicate, some of their offspring become long-lived memory cells.
The markers examined to date were expressed in quiescent satellite cells, and the proteins remained present as the satellite cells are activated and begin to proliferate.
Once activated, MMPs begin their proteolytic action on the ECM [ 17- 19].
When neutrophils are activated, they begin to produce superoxide radicals (O2*-) and secrete myeloperoxidase (MPO) [ 23].
The persistent neuroinflammatory response triggered by exposing larvae to radiation with its potential long-term deleterious neurological consequences raises the question of why such a disadvantageous response would be activated to begin with.
The nonblood-fed ovary contains quiescent stem cell-like populations for both germline and somatic cells of developing egg follicles, which are activated to begin proliferation and differentiation in response to a blood meal.
We propose that at the M4 stage a fraction of cells from the vegetative meristem, which are slowly cycling and residing in the G2 phase, are activated and begin to move synchronously toward mitosis, while those cells residing in G1 start to prepare to enter the S phase.
I write a lot about adult stem cells — those that hang out in tissues like muscle or skin until damage or trauma stimulate them to activate and begin making replacement cells.
Following the attack on Pearl Harbor, Japanese Americans in the Hawaii National Guard activated and began to guard the beaches, clear rubble, donate blood and aid the wounded but three days later, they were disarmed because of their ancestry.
