Epithelia secretory

Alvaro D, Benedetti A, Marucci L et al (2000) The function of alkaline phosphatase in the liver regulation of intrahepatic biliary epithelium secretory activities in the rat. Hepatology 32 174-184... 

Fig. 2.13 Vomeronasal complex plan views and diagrams of VNO and adnexae (secretory and vascular). Left Bat — generalised (from Cooper and Bhatnagar, 1976) arrow = sensory epithelium. Right Slow Loris (from Hedewig, 1980a) scale bar 100 pm.

Figure 10.1 Typical tracheo-bronchial and bronchiolar epithelia showing the major cell types. The tracheo-bronchial epithelium showing the pseudostratified nature of the columnar epithelium, principally composed of ciliated cells (C), interspersed with goblet cells (G), brush cells (Br), serous cells (S), Kulchitsky s cells (K) and basal cells (B). The bronchiolar epithelium showing the cuboidal nature of the epithelium, principally composed of ciliated cells (C), Clara cells (Cl) and infrequent basal cells. Muc = mucus Ci = cilia N = nucleus Sec = secretory granules.

Goodman MR, Link DW, Brown WR, Nakane PK (1981) Ultrastructural evidence of transport of secretory IgA across bronchial epithelium. Am Rev Respir Dis 123(1) 115—119. 

The major antibody isotype in external secretions is sIgA, and the total amount of IgA synthesized is twice the amount of IgG produced daily in humans. IgA cells represent up to 80% of the entire mucosal lymphoid cell population. sIgA in mucosal secretions results from polymeric IgA transported across mucosal epithelium via binding to the pIgRreceptor (also known as the secretory component). The receptor is eventually cleaved and results in an IgAipIgR complex, referred to as sIgA (Figure 7.2) (Rojas and Apodaca, 2002). 

The eye is a good example of an organ with multiple autonomic nervous system (ANS) functions, controlled by several autonomic receptors. As shown in Figure 6-9, the anterior chamber is the site of several autonomic effector tissues. These tissues include three muscles (pupillary dilator and constrictor muscles in the iris and the ciliary muscle) and the secretory epithelium of the ciliary body. 

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