Understanding Nervous System Cells

Which type of supporting cell in the CNS is responsible for producing myelin sheaths?

• Astrocytes

• Microglia

• Oligodendrocytes

• Ependymal cells

What is the primary function of Schwann cells in the PNS?

• To monitor the health of neurons

• To form myelin sheaths around nerve fibers

• To line the central cavities of the brain and spinal column

• To anchor neurons to their nutrient supplies

Which of the following is a characteristic of dendrites in motor neurons?

• They are long and unbranched

• They are the output regions of the neuron

• They convey incoming messages toward the cell body

• They contain neurotransmitter vesicles

What is the role of astrocytes in the CNS?

• To produce myelin sheaths

• To guide the migration of young neurons

• To form the blood-brain barrier

• To transmit electrical signals

Which type of neuroglia in the CNS is involved in monitoring the health of neurons?

• Astrocytes

• Microglia

• Oligodendrocytes

• Satellite cells

What is the primary function of the myelin sheath?

• To increase the speed of nerve impulse transmission

• To produce neurotransmitters

• To guide the migration of neurons

• To anchor neurons to their nutrient supplies

Which of the following is true about satellite cells in the PNS?

• They form myelin sheaths

• They surround neuron cell bodies with ganglia

• They are involved in electrical signaling

• They line the central cavities of the brain

What is the main structural unit of the nervous system?

• Neuroglia

• Axons

• Neurons

• Dendrites

Which of the following describes the function of axon terminals?

• They are the input regions of the neuron

• They contain vesicles that hold neurotransmitters

• They wrap nerve fibers in the CNS

• They anchor neurons to their nutrient supplies

What is the primary role of ependymal cells in the CNS?

• To produce myelin sheaths

• To line the central cavities of the brain and spinal column

• To support and brace neurons

• To electrically insulate fibers from one another