This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Physiology
mGluR 4 is associated with which taste? 
Select and explain. 
A. Sweet, B. Sour, C. Bitter, D. Umami
D: Umami
Answer: D: Umami 
Explanation: Ans. D UmamiRef: Ganong, 25th ed. pg. 222* Most taste buds on the tongue and other regions of the mouth can detect umami taste, irrespective of their location.* Biochemical studies have identified the taste receptors responsible for the sense of umami as modified forms of mGluR4, mGluR1 and taste receptor type 1 (T1R1 + T1R3), all of which have been found in all regions of the tongue bearing taste buds.