Substance P is best described as which of the following?

Explore the Biological Bases of Behavior Test. Prepare with engaging flashcards and multiple choice questions, each featuring explanations. Start practicing today!

Multiple Choice

Substance P is best described as which of the following?

Substance P is best described as a neurotransmitter and neuropeptide. It is an 11‑amino‑acid peptide produced in neurons, stored in synaptic vesicles, and released at synapses to enhance pain signaling and inflammation. It acts on receptors such as neurokinin-1 (NK1) on postsynaptic neurons and other cells, modulating nociceptive transmission and vascular responses. It’s not a steroid, which are lipid‑soluble hormones derived from cholesterol, and it’s not a gasotransmitter like nitric oxide. While peptides can act as hormones, substance P primarily serves as a local signaling molecule in the nervous system rather than an endocrine signal, fitting the role of a neurotransmitter and neuropeptide.

Substance P is best described as a neurotransmitter and neuropeptide. It is an 11‑amino‑acid peptide produced in neurons, stored in synaptic vesicles, and released at synapses to enhance pain signaling and inflammation. It acts on receptors such as neurokinin-1 (NK1) on postsynaptic neurons and other cells, modulating nociceptive transmission and vascular responses. It’s not a steroid, which are lipid‑soluble hormones derived from cholesterol, and it’s not a gasotransmitter like nitric oxide. While peptides can act as hormones, substance P primarily serves as a local signaling molecule in the nervous system rather than an endocrine signal, fitting the role of a neurotransmitter and neuropeptide.

More practice questions