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The ability of mouse retinal ganglion axons to regrow through a grafted sciatic nerve but not through the optic nerve demonstrates that a. adult retinal ganglion cells cannot remake growth cones. O b. only neurons whose cell bodies are in the PNS can regrow. c. neurons in the CNS are capable of remaking axons, but the CNS environment blocks their regrowth. O d. neurons in the CNS cannot regrow their axons. e. All of the above are correct

The ability of mouse retinal ganglion axons to regrow through a grafted sciatic nerve but not through the optic nerve demonstrates that a. adult retinal ganglion cells cannot remake growth cones. O b. only neurons whose cell bodies are in the PNS can regrow. c. neurons in the CNS are capable of remaking axons, but the CNS environment blocks their regrowth. O d. neurons in the CNS cannot regrow their axons. e. All of the above are correct

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Please do both and explain.

The ability of mouse retinal ganglion axons to regrow through a grafted sciatic nerve but not through the optic nerve demonstrates that a. adult retinal ganglion cells cannot remake growth cones. O b. only neurons whose cell bodies are in the PNS can regrow. c. neurons in the CNS are capable of remaking axons, but the CNS environment blocks their regrowth. O d. neurons in the CNS cannot regrow their axons. e. All of the above are correct The nerve transection performed by Sir Henry Head on himself found that O a. general sensitivity to pressure and touch was regained last. O b. fine motor control was regained first. O c. the severed nerves were completed regenerated within two years. O d. different neurons regrew axons and made new synapses at different times after the surgery. O e. None of the above are correct
Transcribed Image Text:The ability of mouse retinal ganglion axons to regrow through a grafted sciatic nerve but not through the optic nerve demonstrates that a. adult retinal ganglion cells cannot remake growth cones. O b. only neurons whose cell bodies are in the PNS can regrow. c. neurons in the CNS are capable of remaking axons, but the CNS environment blocks their regrowth. O d. neurons in the CNS cannot regrow their axons. e. All of the above are correct The nerve transection performed by Sir Henry Head on himself found that O a. general sensitivity to pressure and touch was regained last. O b. fine motor control was regained first. O c. the severed nerves were completed regenerated within two years. O d. different neurons regrew axons and made new synapses at different times after the surgery. O e. None of the above are correct
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