In the process of signal amplification, a single G-protein is activated by each photopigment molecule, and each PDE enzyme breaks down a single cGMP molecule.

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Neuroscience is the scientific study of the nervous system (the brain, spinal cord, and peripheral nervous system), its functions and disorders. It is a multidisciplinary science that combines physiology, anatomy, molecular biology, developmental biology, cytology, psychology, physics, computer science, chemistry, medicine, statistics, and mathematical modeling to understand the fundamental and emergent properties of neurons, glia and neural circuits. Some main neuroscience subfields are: Clinical neuroscience: Studies the mechanisms that underlie diseases and disorders of the brain and... Show more

In the process of signal amplification, a single G-protein is activated by each photopigment molecule, and each PDE enzyme breaks down a single cGMP molecule.