Neuron Structure and Composition Quiz
40 Questions
2 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What are the two major divisions of the nervous system?

  • Sympathetic and parasympathetic divisions
  • Cranial and spinal divisions
  • Somatic and autonomic divisions
  • Central and peripheral divisions (correct)
  • Which part of the nervous system consists of the brain and spinal cord?

  • Sympathetic nervous system
  • Central nervous system (correct)
  • Peripheral nervous system
  • Autonomic nervous system
  • What is the function of glial cells in nerve tissue?

  • Produce neurotransmitters
  • Transmit electrical signals
  • Generate myelin sheath
  • Support and protect neurons (correct)
  • From which embryonic layer does the nervous system develop?

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

    What structure signals the ectoderm to form the epithelial neural plate during development?

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

    What is the function of Nissl bodies in the cytoplasm?

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

    What is the role of lipofuscin in the neuron's cytoplasm?

    <p>Accumulating with age (A)</p> Signup and view all the answers

    What is the purpose of satellite glial cells surrounding neuronal cells?

    <p>Provide structural support (A)</p> Signup and view all the answers

    In which part of the nervous system can pseudounipolar neurons with lipofuscin be found?

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

    Which cells are responsible for producing myelin in the white matter of the central nervous system?

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

    What is the main function of the neuronal cell body?

    <p>Producing cytoplasm for cell processes (A)</p> Signup and view all the answers

    Where are most neuronal cell bodies located in the CNS?

    <p>In gray matter (B)</p> Signup and view all the answers

    What is the primary cause of Parkinson's disease according to the text?

    <p>Apoptosis of dopamine-producing neurons (A)</p> Signup and view all the answers

    In which region are cell bodies found in the PNS?

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

    What neurotransmitter's production is augmented by l-dopa in Parkinson's disease treatment?

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

    What is the main function of arachnoid villi in the central nervous system?

    <p>Absorption of cerebrospinal fluid into venous circulation (D)</p> Signup and view all the answers

    What is a distinguishing feature of peripheral nerves in the peripheral nervous system?

    <p>Consist of axons enclosed within Schwann cells (B)</p> Signup and view all the answers

    What type of cells sheath axons in the peripheral nerves and may or may not form myelin around them?

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

    How do myelinated nerve fibers differ from unmyelinated fibers?

    <p>Myelinated fibers have multiple layers of Schwann cell membrane forming myelin sheath (C)</p> Signup and view all the answers

    What distinguishes Schwann cells from oligodendrocytes in terms of myelination in the nervous system?

    <p>Schwann cells only partially myelinate one axon (A)</p> Signup and view all the answers

    What is the main function of the gray matter in the spinal cord?

    <p>Support and nourish neuronal cell bodies (C)</p> Signup and view all the answers

    Which cells are primarily found in the white matter of the spinal cord?

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

    What is the main characteristic of the large motor neurons in the ventral horns of the spinal cord?

    <p>Extensive protein synthesis indicated by prominent nucleoli and Nissl substance (C)</p> Signup and view all the answers

    Where can tracts with empty myelin sheaths be observed in the spinal cord?

    <p>In the white commissure ventral to the central canal (C)</p> Signup and view all the answers

    True or False: The spinal cord has bilateral symmetry only in its cross-section.

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

    What is the term for the fine intercellular network in the central nervous system that resembles collagen?

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

    During embryonic development, which structure separates from the neuroepithelium to become mesenchymal?

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

    What do glial cells in the CNS primarily support and create optimal microenvironments for?

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

    Which cells give rise to the entire central nervous system, including neurons and most glial cells?

    <p>Ectoderm-derived cells (B)</p> Signup and view all the answers

    What population of cells migrates extensively and differentiates into all cells of the peripheral nervous system?

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

    What is the primary function of oligodendrocytes in nerve tissue?

    <p>Forming myelin (B)</p> Signup and view all the answers

    Which cell type in the nervous system performs the function of removing cellular debris?

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

    What is the primary role of Schwann cells in the peripheral nervous system?

    <p>Forming myelin (B)</p> Signup and view all the answers

    Which cell type is primarily responsible for maintaining the blood-brain barrier?

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

    Which cells are considered irritable or excitable due to their ability to rapidly change their electrical potential?

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

    What is the primary function of neurons in the nervous system?

    <p>Transmitting information as electrical signals (D)</p> Signup and view all the answers

    Which glial cells provide support and insulation between neurons in the nervous system?

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

    In response to stimuli, what do neurons typically experience first?

    <p>Membrane depolarization (B)</p> Signup and view all the answers

    What distinguishes excitable cells like neurons from other cell types in terms of responding to stimuli?

    <p>Altering electrical potential across plasma membranes (C)</p> Signup and view all the answers

    What is a significant role of microglial cells in nerve tissue?

    <p>Removing cellular debris (A)</p> Signup and view all the answers

    More Like This

    Neurons Structure and Function
    12 questions
    Neurons and Their Structure
    28 questions
    Atomic Composition Quiz
    50 questions
    Neuron Structure and Composition
    21 questions
    Use Quizgecko on...
    Browser
    Browser