How many types of photoreceptor cells are present in the retina?

What is the full form of PNS?

Which of these fluids is the membranous labyrinth surrounded by?

At which of these sites will you find a yellowish pigmented spot?

How is the resting potential restored after a nerve impulse?

Which of these does not take place when a stimulus is applied to a polarized axonal membrane?

Which of these structures is present in both non-myelinated and myelinated neurons?

At resting membrane potential, the axonal membrane is permeable to which ions?