If an optic nerve of a mature frog is transected and half of the associated retina is destroyed,
A) the axons grow out from the retinal ganglion cells in the remaining half of the retina to their original targets on the optic tectum.
B) the destroyed retina regenerates and then axons grow out from the complete retina and innervate the optic tectum in the species-typical fashion.
C) the axons grow out from the retinal ganglion cells in the remaining half of the retina to targets systematically distributed over the entire optic tectum.
D) half of the optic tectum degenerates.
E) both A and D

Question

Quizplus · Accepted Answer

The axons from the remaining half of the retina in frogs can grow out and innervate the entire optic tectum, not just the part they originally targeted, demonstrating the remarkable regenerative and adaptive capabilities of the amphibian nervous system.

If an Optic Nerve of a Mature Frog Is Transected