Neuroglia
These PNS glial cells myelinate a single axon segment.
Answer: Schwann cells
In the spinal cord, this tissue type is located deep.
Answer: Gray matter
The resting membrane potential of a neuron.
Answer: –70 mV
Neurons that carry signals toward the CNS.
Answer: Sensory (afferent) neurons
These CNS glial cells can myelinate multiple axons.
Answer: Oligodendrocytes
In the spinal cord, this tissue type is located superficially.
Answer: White matter
When the membrane potential becomes less negative.
Answer: Depolarization
Neurons that carry signals away from the CNS to muscles or glands.
Answer: Motor (efferent) neurons
These glial cells form the blood-brain barrier with their foot processes.
Answer: Astrocytes
The spinal cord ends approximately at this vertebral level.
Answer: L1–L2
When the membrane potential becomes more negative.
Answer: Hyperpolarization
Neurons that integrate and relay signals within the CNS.
Answer: Interneurons
These CNS cells act as macrophages and clean up debris.
Answer: Microglia
The tapered end of the spinal cord is called this.
Answer: Conus medullaris
More myelin has this effect on impulse conduction speed.
Answer: It increases conduction speed
Ascending pathways are associated with this type of neuron function.
Answer: Sensory (afferent)
These modified epithelial cells line ventricles and produce cerebrospinal fluid.
Answer: Ependymal cells
The bundle of spinal nerves below the spinal cord is called this.
Answer: Cauda equina
This type of conduction occurs at the nodes of Ranvier.
Answer: Saltatory conduction
Descending pathways are associated with this type of neuron function.
Answer: Motor (efferent)