The spinal cord and the brain make up the central nervous system, and spinal cord nerves carry most messages between the brain and the rest of the body.
The vagus nerve carries the signal from the brain to the heart.
Explanation:
Reflexes do slow with age. Physical changes in nerve fibers slow the speed of conduction. And the parts of the brain involved in motor control lose cells over time.
Researchers found that the brain's response time begins to decline at age 24. The descent is a slow, but nonetheless, steady one.
Answer:
1977 is when people first knew about archaebacteria
Answer:
eukaryotic
Both plant and animal cells are eukaryotic, so they contain membrane-bound organelles like the nucleus and mitochondria
