These cells migrate to the pial surface by following a reelin gradient during the development of the neocortex. For 10 points each:
[10e] Name these cells that mainly consist of a soma body, dendrites, and a long axon.
ANSWER: neurons [or nerve cells; accept neuronal migration]
[10h] Reelin induces migrating neurons to express Dab1, a factor that aids in the formation of these projections by stabilizing F-actin into bundles. These thin projections typically form from the microspikes of a lamellipodium.
ANSWER: filopodia [or filopodium; prompt on pseudopodia or pseudopodium or pseudopods]
[10m] During cortico·genesis, reelin is secreted by cells named for this biologist and Gustav Retzius. This biologist employed a modified Golgi stain to discover pyramidal neurons.
ANSWER: Santiago Ramón y Cajal [accept Cajal–Retzius cells; reject “Ramón”]
<Kane Nguyen, Biology>