Staci Bilbo’s lab found that these cells shape social play behavior by eliminating D1 dopamine receptors in male but not female rats. In TREM-2-deficient Alzheimer’s mouse models, these cells lack a DAM profile. Starting 3 to 5 days post-necrosis, stroke histology is mainly characterized by these cells once they lose their ramified morphology. These IBA1-positive, CD45-negative cells self-sacrifice via necroptosis after cannibalizing each other’s debris. Biologists now use terms like “neurodegenerative” and (*) “disease-associated” to classify these [emphasize] specific cells’ activated versus resting (10[1])states, instead of their broader cell type’s M1 and (-5[2])M2 (10[2])classes. Unlike the (10[1])neuroectoderm, the yolk sac yields these protective cells in Ramón y Cajal’s “third element” that provide (10[1])immune surveillance. For 10 points, name these resident brain (0[1])macrophages. (10[1]0[3])■END■