If an Optic Nerve of a Mature Frog Is Transected

question 119

Multiple Choice

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

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