Define neuropeptides?

Neuropeptides are small protein molecules that act as neurotransmitters in the brain and nervous system. They are involved in regulating various physiological processes such as pain perception, mood, stress response, and appetite. Neuropeptides are produced and released by neurons and can bind to specific receptors on target cells to elicit a response.

Neuropeptides are small proteins, typically composed of 3–50 amino acids, that act as neurotransmitters or neuromodulators in the nervous system. They are synthesized in the cell bodies of neurons and released at synapses, where they bind to receptors on the postsynaptic neuron or other target cells. Neuropeptides are involved in a wide range of physiological and behavioural processes, including hormone release, pain perception, mood regulation, and memory. They are also involved in the development of certain neurodegenerative diseases, such as Alzheimer's and Parkinson's diseases.