Author Question: In the development of the cerebral cortex a. intrinsic genetic factors control all ... (Read 17 times)

james0929 · **on:** Jun 21, 2018

In the development of the cerebral cortex

a. intrinsic genetic factors control all differentiation.
b. extrinsic inducing factors control all differentiation.
c. a combination of intrinsic genetic factors and extrinsic inducing factors control differentiation.
d. neither intrinsic genetic factors nor extrinsic inducing factors appear to play a role in differentiation.

Question 2

Compared to the muscles of young adults, the muscles of elderly people

a. contain fibers that are more angular than round.
b. show a more even distribution of slow and fast twitch fibers.
c. are more likely to be hybrids of fast and slow twitch fibers.
d. are more likely to be made up of slow twitch fibers.