PEIR Digital Library

Welcome to the Pathology Education Informational Resource (PEIR) Digital Library, a multidisciplinary public access image database for use in medical education.

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DIAGRAM: BRONCHUS: Asthma: Early phase of an asthma attack, expanded view, cellular level; Reaction of the airways to an antigen begins within 15 minutes after exposure, when inflammatory lymphokines and IgE-binding factors are secreted from T-lymphocytes. Along with neuropeptides and ATP, they activate the mast cells to prolife