Answer:
hyperpolarized.
Explanation:
In the darkness, the bipolar cells are highly hyperpolarized because in the bipolar cells, photoreceptors maximally release glutamate. In the presence of light, the bipolar cells release less glutamate which leads to less hyperpolarized of photoreceptors. These bipolar cells are called on-center bipolar cells because they are active when the light is on and inactive when there is no light or darkness in the surroundings.
