Fermented soy occupies the 3-beta adiol
receptor site, which we know as ER-b, and provides the same protection.
Over a multi-year recovery period, the opioid
receptor sites can become re- sensitized to the low levels of natural opioids produced in the body.
Local anesthetic action seems to be controlled by two factors: the size of the adsorbate molecule and some charge-related quality that reflects the ability to act at the
receptor site. The first factor concerns the non-receptor specific actions, and the latter may come into play as more is discovered about specific sites of action.
The ligand part of the molecular package, called a quencher-tether-ligand (QTL), is the "key" that fits into a
receptor site on a specific biological or chemical species.
Some medications with quite specific effects--beta-blockers, for example, which minimise stage fright without dulling the concentration that a musician will require to perform--are already available (their name is derived from the specific
receptor site they block).
Normally if quinolinic acid is released in brief bursts, it excites the NMDA
receptor site to an extent that is not harmful to cells.
When plant estrogens occupy a
receptor site, there's no room in that site for dangerous estrogens--like those found in the environment--to occupy.
A male with low libido may have depressed testosterone, elevated estrogen, depressed luteinizing hormone (LH), elevated dihydrotestosterone creating androgen
receptor site resistance, or elevated androstenedione competing with testosterone
receptor sites.
One thought is that when a hypocretinergic neuron releases hypocretin, the neurotransmitter attaches to its
receptor site on a nearby glutamatergic neuron.
The neurotransmitter then stimulates an adjacent cell by fitting into a "
receptor site" on its surface, very much as a key fits into a lock.
Additionally, chronic stimulation at the
receptor site is believed to be responsible for upregulation (an increase) in the number of receptors expressed at the cell surface.
These drugs block the effect of angiotensin II at the
receptor site. They delay heart remodeling and reduce symptoms, and they have been shown to reduce hospitalizations and deaths.
