During migration, most neurons are guided to their ultimate location by special progenitor cells known as
a. mitochondria.
b. radial glia.
c. oligodendrocytes.
d. synapses.
Question 2
An athlete with likely potential in Olympic weightlifting would probably have _________ in the quadriceps muscle.
a. about the same number of fast- and slow-twitch fibers
b. more fast- than slow-twitch fibers
c. more slow- than fast-twitch fibers
d. only fast-twitch muscles