A receptor is a molecular target for a chemical signal such as a neurotransmitter, hormone, or drug. Binding of the signal to the receptor initiates or modulates behaviour in the receiving cell.

learn more… | top users | synonyms

16
votes
2answers
1k views

Are single-celled organisms capable of learning?

I've read that the amoeba is capable of learning. Since these protists have no nervous system, it's safe to assume that even highly simplified learning mechanisms of the Aplysia are miles off in the ...
2
votes
1answer
80 views

Why are skin tactile receptors considered to be phasic receptors?

A phasic receptor by definition is one that quickly adapts to change. In terms of neuron firing, this means that it does not trigger another firing because the receptors are used to the stimulus. But ...