Receptors for sour, salty, sweet and bitter tastes are located on the ________________________. 
                            
                         
                        
                            
                        
                             
                            
                            
                            
                                Explanation
                            
                                
                                    Answer: A - Receptors for sour, salty, sweet and bitter tastes are located on the tongue, throat, cheeks and mouth roof.
Key Takeaway:  Taste receptors (sour, salty, sweet, bitter) are located on the sides of the tongue, the throat, the cheeks, and the roof of the mouth.  Taste perception is a type of chemoreception of food, minerals and some toxic materials.  Taste is a chemical process whereby the food particles are dissolved in the mouth and the chemoreceptors in these locations transfer these signals to the brain whereby the actual taste is identified.