31. Extracellular receptors are conformation of the inside part of the receptor. 32. Extracellular receptors are conformation of the inside part of the receptor . 33. These include serum proteins and pattern recognition receptors ( PRRs ). 34. These fields of receptors respond to different directions of antennal movements. 35. The photoreceptor in the centre is the current receptor being processed. 36. Agonists increase the level of receptor activation, antagonists reduce it. 37. Another possible mechanism underlying tinnitus is damage to the receptor cells. 38. Achondroplasia is a mutation in the fibroblast growth factor receptor 3. 39. This mechanism involves direct effects on antipsychotic drugs on glutamate receptors . 40. The similar medications angiotensin receptor blockers ( ARBs ) do not.