Question

Which of the following if any, would be considered part of the Central Nervous System?

a. Spinal nerves, such as the radial or ulnar nerve
b. Your brain
c. the dorsal root ganglia
d. answer not listed
e. The optic nerve that travels from the retina level to the brain
f. your spinal cord

Answer 1

The CNS is composed of the brain and spinal cord, so options b (your brain) and f (your spinal cord) are part of the CNS. The other options listed are part of the peripheral nervous system, though the optic nerve is considered part of the CNS for its direct connection to the brain.

Step-by-step explanation:

The central nervous system (CNS) is comprised of the brain and spinal cord. Therefore, from the options provided:

b. Your brain is part of the CNS.

f. Your spinal cord is also part of the CNS.

Options a (spinal nerves, such as the radial or ulnar nerve) and c (the dorsal root ganglia) are components of the peripheral nervous system (PNS). The optic nerve (e) is considered a part of the CNS even though it is anatomically a cranial nerve because it directly connects to the brain and is covered by meninges. The spinal nerves are involved in the somatic nervous system, with afferent and efferent branches as part of the PNS, which includes sensory and motor pathways connecting the CNS to limbs and organs. The optic nerve transfers visual information from the retina to the brain.

Answer 2

The correct options are : b. Your brain, e. The optic nerve that travels from the retina level to the brain and f. your spinal cord.

Step-by-step explanation:

Nervous system is composed of two major parts:

1. central nervous system

2. peripheral nervous system.

Central nervous system or CNS, is responsible for the integration of received information and also coordinates the various activities of all the body parts in the bilaterally symmetric animals. It contains the brain, the spinal cord and the optic nerve.

Whereas, peripheral nervous system or PNS, consists of all the nerves and the ganglia present outside the brain and the spinal cord. Therefore, the spinal nerves, radial or ulnar nerves and dorsal root ganglia are a part of the peripheral nervous system.

Therefore, the brain, the spinal cord and the optic nerve are a part of the Central Nervous System.