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>Qualitative and quantitative freeze-fracture studies on olfactory and nasal respiratory epithelial surfaces of frog, ox, rat, and dog
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Qualitative and quantitative freeze-fracture studies on olfactory and nasal respiratory epithelial surfaces of frog, ox, rat, and dog
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机译：Qualitative and quantitative freeze-fracture studies on olfactory and nasal respiratory epithelial surfaces of frog, ox, rat, and dog
The densities and diameters of intramembranous particles in olfactory and nasal respiratory structures of frog, ox, rat and dog have been compared using the freeze-fracture technique. Dendritic endings and the various segments of the cilia of the olfactory receptor cells of a given species have identical particle densities (700–1,800 particles/μm2in P-and 100–600 in E-faces). Densities in P-faces of respiratory cilia are about 1/3 of those in the olfactory cilia. E-face particle densities of these respiratory cilia are often higher than P-face densities. Microvillus P-face densities range from 700–2,000 (respiratory cell microvilli) to 1,800–3,400 particles/μm2(olfactory supporting and Bowman's gland microvilli). Microvillus E-faces show no conspicuous mutual differences. Literature comparisons showed that odour concentrations at threshold are considerably lower (105–1010times) than the concentrations of olfactory receptor ending intramembranous particles (5 μM–30 μM) expressed in
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