The inner hair cells (IHCs) are the primary sensory receptors adapted for rapid auditory signaling, but they are not thought to be intrinsically tuned to encode particular sound frequencies.
The later possibility is the most interesting: while it is true that the MAP kinase cascade can be considered to be a component of a relatively well-defined enzymatic pathway that transduces signals from growth factor receptors to the cell nucleus, the organization of this cascade changes over time as receptors adapt and negative regulatory pathways are activated.
The most prominent receptors are the bronchopulmonary C-fiber receptors, rapidly adapting receptors (RARs) and slowly adapting pulmonary stretch receptors (PSRs) (Table 1).
Opiate tolerance is virtually complete, so in the medium term an addict's consumption is limited only by his ability to find cash; the cheaper the stuff gets, the more he uses, without getting any more pleasure out of it once his receptors have adapted.
Unlike the receptor cells of the taste and olfactory systems, vomeronasal receptor cells adapt slowly, or sometimes not at all, when continuously stimulated; therefore, the transfer of information to the brain is maintained.
Receptor activity adapts to persistent stimulus through methylation and demethylation of the receptors by the enzymes CheR and CheB, respectively.
In these cases, the adapted receptor activity becomes saturated, hence, quenching fluctuations transmitted by receptors.
Purportedly, the vagal afferent neurons of the true cough receptor are unlike the rapidly adapting receptors (RARs), slowly adapting receptors (SARs) or C-fibers; also, this receptor does not express transient receptor potential vanilloid (TRPV1) and is not sensitive to capsaicin.
The technique prevents inaccurate recording of the gingival architecture by using a dual polymerizing composite resin placed into the sulcus and pontic receptor sites and adapted to the open tray implant impression copings.
Even in presence of a perfectly adapted receptor structure, docking simulations can fail mainly because of well known limitations and approximations introduced in sampling and scoring, extensively reported and discussed elsewhere [7] [15].
