Get detailed and reliable answers to your questions on IDNLearn.com. Find the solutions you need quickly and accurately with help from our knowledgeable community.

Chemoattractive molecules are called _____ and guide axons, while chemorepulsive molecules are called _____ and prevent axon extension in their vicinity.

a. growth cones; filopodia
b. semaphorins; netrins
c. synapses; netrins
d. netrins; semaphorins