Question

5.
Which of these is true?
(a) All nerves are connected directly to the brain.
(b) Only some nerves are connected directly to the brain.
(c) All nerves act through the spinal cord.​

Answer 1

Answer:

Statement B is true.

Explanation:

Nerves can be categorized into two groups based on where they connect to the central nervous system:

   Spinal nerves innervate (distribute to/stimulate) much of the body, and connect through the vertebral column to the spinal cord and thus to the central nervous system. They are given letter-number designations according to the vertebra through which they connect to the spinal column.

   Cranial nerves innervate parts of the head, and connect directly to the brain (especially to the brainstem). They are typically assigned Roman numerals from 1 to 12, although cranial nerve zero is sometimes included. In addition, cranial nerves have descriptive names