Primary & Secondary sensroy receptors?

I don't remember the exact names for the two types of sensory receptors, but i know one generates action potential and the other one (secondary one) just releases neruontransmitter onto the second order neuron, which then generates action potential. What are the exact names for those two types receptors?

And correct me if I am wrong: mechano %26 olfaction use the primary one, and taste, hearing and vision use the secondary one?

Thanks sooo much =)
Answer:
Holy cow. I'm not sure I understand this question but I *think* you are asking about Tonic Receptors and Phasic Receptors. =o)

Tonic - Odor and Touch.
Phasic - Vision, Hearing and Taste.

Hope I got it right.

---