Table 2.

Responses of all cells examined

Hunger level	Treatment	Responders	Nonresponders	Uncategorizable	Total cells
Well fed	10 μm NPY	0	1	0	1
	5 μm NPY	2	0	1	3
	1 μm NPY	0	5	0	5
	100 nm NPY	0	6	2	8
	10 nm NPY	0	2	0	2
	5 nm NPY	0	1	0	1
	1 nm NPY	0	1	0	1
	Control	2	9	0	11
Hungry	1 μm NPY	1	1	0	2
	100 nm NPY	7	11	0	18
	Control	0	4	0	4
Total cells		12	41	3	56

Response of the inward current in olfactory receptor neurons from well fed and hungry animals to different concentrations of synthetic axolotl NPY, as well as to a control solution (fast green). Significantly more neurons from hungry animals responded to application of NPY with an increase in the magnitude of the inward current, although neurons from well fed animals were exposed to higher concentrations of NPY. For categorization criteria, see Materials and Methods.