Provide an in-depth explanation for the question below:
Discuss the role of grey and white matter in the brain and spinal cord. How do they contribute to the coordination and transmission of nerve impulses?
a. The main function of grey matter is to _________.
b. White matter appears white because of _________.
c. In the spinal cord, grey matter is located ________.
d. Which statement is true regarding white matter?
e. Reflex actions are coordinated by __________.