Figure 3From: Possible role of the α7 nicotinic receptors in mediating nicotine’s effect on developing lung – implications in unexplained human perinatal death Positive α7 nAChR epithelial cells surrounding in A) the lumen of an alveolus and in B) the lumen of a bronchiole – SIDS case, 2 month-old. α7 nAChR immunostain; magnification: 40×.Back to article page