In what way is a neuropeptide intermediate between...

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Key Concepts

Neurotransmitters

Neurotransmitters are small chemical messengers released at synapses by neurons to rapidly transmit signals over short distances. Their effects are typically fast and transient, allowing for quick changes in neural activity and immediate responses in target cells within the nervous system.

Hormones

Hormones are chemical signals released by endocrine glands into the bloodstream to affect distant target cells. They often have slower, more sustained effects than neurotransmitters, regulating broader physiological processes across various tissues and organs throughout the body.

Neuropeptides

Neuropeptides are signaling molecules released by neurons that exhibit characteristics of both neurotransmitters and hormones. They act locally in the brain like neurotransmitters to modulate synaptic activity, yet they also have the capacity to be released into the circulatory system and influence systemic functions much like hormones. This dual role allows them to bridge the gap between fast synaptic transmission and prolonged endocrine signaling.

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