Question

neurons transmit information and are found in the brain and spinal cord while neuroglia _______

have a number of supportive and protective functions
found in the ventricles of the brain are responsible for producing myelin.
speed the conduction of an electrical current in the spinal nerves only.
are only found in the spinal cord.

Explanation:

Identify the core question

Using the Glial Cells knowledge point
The question asks to complete the statement comparing neurons and neuroglia (glial cells) by identifying the primary role or characteristic of neuroglia.

Analyze the options

Using the Glial Cells knowledge point

• Option 1: "have a number of supportive and protective functions" — Neuroglia support, nourish, insulate, and protect neurons. This is their primary definition.
• Option 2: "found in the ventricles of the brain are responsible for producing myelin" — Ependymal cells line the ventricles but do not produce myelin (oligodendrocytes produce myelin in the CNS).
• Option 3: "speed the conduction of an electrical current in the spinal nerves only" — Myelination occurs in both the CNS and PNS, not "spinal nerves only."
• Option 4: "are only found in the spinal cord" — Neuroglia are abundant throughout both the brain and spinal cord (CNS), as well as the PNS.

Select the correct option

Using the Glial Cells knowledge point
Option 1 is the only biologically accurate statement.

Answer:

• have a number of supportive and protective functions (Correct answer)
• found in the ventricles of the brain are responsible for producing myelin.
• speed the conduction of an electrical current in the spinal nerves only.
• are only found in the spinal cord.