List the 3 central chemoreceptors in alphabetical order

Question

I can not find this answer anywhere! Please help! 

Answer 1

glossopharyngeal, olfactory and vagal.....A guess as the central chemoreceptors are present in the medulla near the exit of the 9th and 10 th nerves. also you have chemoreceptors in the olfactory receptor neurons and in the taste buds .