Which of the following are amoebalike in their appearance and movements?
A) growth cones
B) ependymal cells
C) neural cell-adhesion molecules
D) radial glial cells
E) retinal ganglion cells
Question 2
At 24 days after conception, the precursor of the PNS is visible in the developing embryo. This structure, which is illustrated here at the end of the pointer line, is the neural
A) tube.
B) plate.
C) crest.
A) groove.
E) stem.