nervous system
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Questions and Answers

Which part of the nervous system includes the brain and spinal cord?

  • Sensory nervous system
  • Central nervous system (correct)
  • Motor nervous system
  • Peripheral nervous system

    • What are the two main cell types in nerve tissue?

  • Oligodendrocytes and microglia
  • Neurons and astrocytes
  • Astrocytes and microglia
  • Neurons and oligodendrocytes (correct)

    • What is the function of astrocytes in the nervous system?

  • Support and nourishment of neurons (correct)
  • Distribution of the meninges
  • Histologic structure of nerve fibers
  • Production of myelin

    • What is the role of oligodendrocytes in nerve tissue?

    <p>Production of myelin (A)</p> Signup and view all the answers

    What is the function of ependymal cells in the nervous system?

    <p>Line the ventricles of the brain and spinal canal (D)</p> Signup and view all the answers

    What is the role of microglia in nerve tissue?

    <p>Immune defense and scavenging cellular debris (A)</p> Signup and view all the answers

    What is the function of Schwann cells in the peripheral nervous system?

    <p>Production of myelin (C)</p> Signup and view all the answers

    Which part of the neuron receives signals from numerous other neurons?

    <p>Dendrites (D)</p> Signup and view all the answers

    Which part of the neuron typically has only one and does not branch?

    <p>Axon (A)</p> Signup and view all the answers

    Which type of glial cell is the most numerous in the brain?

    <p>Astrocytes (A)</p> Signup and view all the answers

    Which glial cell type makes myelin and insulates axons in the central nervous system?

    <p>Oligodendrocytes (A)</p> Signup and view all the answers

    What is the function of microglial cells in the central nervous system?

    <p>Eat up debris and dead cells (C)</p> Signup and view all the answers

    What is neuropil?

    <p>A dense network of glial fibers (D)</p> Signup and view all the answers

    What is the function of dendritic spines?

    <p>Receive information from a single axon (C)</p> Signup and view all the answers

    Which cells are involved in the transfer of molecules from blood to neurons and are also involved in the blood-brain barrier?

    <p>Astrocytes (D)</p> Signup and view all the answers

    What is the main function of astrocytes?

    <p>To regulate the composition of the extracellular environment and support the survival and activity of neurons (A)</p> Signup and view all the answers

    What is the main function of ependymal cells?

    <p>To line the central canal of the spinal cord and ventricles of the brain (D)</p> Signup and view all the answers

    What is the main function of microglial cells?

    <p>To act as immune defender cells (D)</p> Signup and view all the answers

    What is the main glial cell of the peripheral nervous system?

    <p>Neurolemmocytes or Schwann cells (C)</p> Signup and view all the answers

    What is the function of gray matter in the brain and spinal cord?

    <p>Contains neuron cell bodies, dendrites, unmyelinated axons, glial cells, and synapses (C)</p> Signup and view all the answers

    What are the three layers of the meninges that surround the brain and spinal cord?

    <p>Dura mater, arachnoid mater, pia mater (D)</p> Signup and view all the answers

    Which layer of the meninges is in contact with the dura mater?

    <p>Arachnoid (C)</p> Signup and view all the answers

    What is the function of the blood-brain barrier?

    <p>Prevents passage of drugs and toxins into CNS tissue (D)</p> Signup and view all the answers

    What are the two main components of the peripheral nervous system?

    <p>Nerves and ganglia (C)</p> Signup and view all the answers

    What surrounds and forms myelin around PNS axons?

    <p>Schwann cells (B)</p> Signup and view all the answers

    What are nodes of Ranvier?

    <p>Breaks in the myelin sheath (D)</p> Signup and view all the answers

    What is the outer dense connective tissue fibrous coat surrounding nerve bundles and spaces between nerve fibers called?

    <p>Epineurium (D)</p> Signup and view all the answers

    What surrounds each fiber bundle or fascicle in the peripheral nervous system?

    <p>Perineurium (C)</p> Signup and view all the answers

    What is the innermost layer of the meninges called?

    <p>Pia mater (A)</p> Signup and view all the answers

    What is the function of the astrocyte foot processes in the blood-brain barrier?

    <p>Forms tight junctions between endothelial cells (D)</p> Signup and view all the answers

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