Final answer:
True, the role of a neurocrine as either a neurotransmitter or neuromodulator depends on the type of receptors on the postsynaptic cell.
Step-by-step explanation:
The statement that the same neurocrine can act as a neurotransmitter or neuromodulator depending on the receptors present on the postsynaptic cell is True. Neurotransmitters can have different effects depending on whether they bind to excitatory or inhibitory receptors on the postsynaptic cell. For example, a neurotransmitter might excite one set of target cells, inhibit another, and modulate others in more complex ways. The differences in effects are often due to the specific type of receptor that the neurotransmitter binds to on the postsynaptic cell. This variability underscores the complex role that signaling molecules like neurotransmitters play in neural communication and how their function is not solely based on the molecule itself but also on the context of its interaction with receptors.