The human brain is the most complex structure in the universe.
It contains (36) 100 billion nerve cells, each of which has
thousands of connections with each other. Their (37)
controls each of the body’s functions, allows thoughts, perceptions, memories,
feelings, and also (38) and communication. Understanding
just how the brain works, in health or in sickness, is one of the greatest
(39) of our time. What is determined by genes, what is
formed by experience Scientists-are (40) all aspects of
the nervous system. Great progress can be (41) in
visualizing and modeling brain functions, as well as in research into their
biological basis. Today, it is (42) that 30 to 50 percent of
human genes exercise their function chiefly in the brain. This gives an
(43) of the complexity of the genetic control and
development. (44) . Half of all genetic diseases affect the
nervous system. The brain can only reach its full capability through interaction
with its surroundings. (45) . How do nerve cell processes
find their goal How do different brain areas develop How do perceiving
functions mature Thanks to research, the prevention and cure of many brain
diseases seems possible for the first time. (46) .
【参考答案】
Researchers are examining the interaction of genes and expe......