1. Discuss why the development of a nervous system would have been advantageous to animals early in their evolution.
2. Discuss the usefulness of cephalization (development of a head with concentrated nervous tissue).
3. Discuss why there are segmental ganglia in annelids and arthropods.
4. Describe how myelination makes the electrical transmission of nervous impulses more rapid.
5. Discuss how the somatic nervous system has motor
functions that deal with skeletal muscles, while the autonomic
nervous system's motor neurons cause the contraction of smooth
or cardiac muscle and effect the release of glandular secretions.