Final answer:
Rods are the photoreceptors in the retina that are responsible for vision in low light conditions. They are highly sensitive to light, and even a single photon can trigger an action potential in the corresponding retinal ganglion cell (RGC).
Step-by-step explanation:
The level of light that results in the greatest release of neurotransmitters (NT) from receptors in the retina is when rods are activated. Rods are photoreceptors that are responsible for vision in low light conditions. They are highly sensitive to light and a single photon can trigger an action potential in the corresponding retinal ganglion cell (RGC).