Central Nervous System & Peripheral Nervous System

Central Nervous System & Peripheral Nervous System

Central Nervous System (CNS) Correct Answer: 1.Brain and spinal cord
2. receives sensory information, figures out a response, and initiates a motor
response.
3. protected by the skull and vertebral column (bone)
4. protective membrane (meninges) and cerebrospinal fluid (spinal tap takes out
fluid to culture it.)

ventricles Correct Answer: Has four of them, two are lateral (3rd and 4th)
All produce and store cervical spinal fluid

Gray Matter Correct Answer: shorter and non-myelinated cell bodies

White Matter Correct Answer: myelinated axons in bundles as tracts

Spinal Cord Correct Answer: starts at the base of the skull (brain) and extends
through the foramen magnum and trough the openings of the vertebrae

Intervertebral Discs Correct Answer: separate the vertebrae

Spinal Cord Function Correct Answer: to provide communication between the
brain and the peripheral nerves that leave the spinal cord

Sensory Receptors Correct Answer: generate nerve impulses that pass on to the
sensory nerve fibers that lead to the spinal cord and up the ascending tract to the
brain.

Brain Correct Answer: 1. initiates voluntary control and sends motor impulses
originating in the brain down the descending tracts to the spinal cord on the motor
nerve fibers to our muscles
2. if the spinal cord is severed (a break in the linkage) paralysis occurs because all
sensation and voluntary control is gone from that point on.

Peripheral Nervous System (PNS) Correct Answer: 1. lies outside of the CNS
2. has cranial nerves stemming from the brain
3. spinal nerves extend out from the spinal cord
4. all nerves take impulses to and from the CNS