I really need help 1. What are the specialized sensory receptor cells for smell

I really need help
1. What are the specialized sensory receptor cells for smell and taste?
2. What type of physical energy (stimulus) does smell and taste respond to?
3. What major structures are included in smell and taste organ?
4. What are the functions of the major structures in smell and taste organ?
Smell: how do we identify particular odors, where do axons from the olfactory nerve go to, pheromones
Taste: details on receptor cells, what makes up the flavor of food