Neuroscience Quiz on Neurons and Neuroglia
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Questions and Answers

What structure of a neuron is responsible for transmitting electrical signals?

  • Cell body (soma)
  • Dendrite
  • Axon (correct)
  • Myelin sheath

    • Which components are involved in forming the blood-brain barrier?

  • Astrocytes, endothelial cells, and pericytes (correct)
  • Red blood cells, glial cells, and neurons
  • Schwann cells, oligodendrocytes, and neurons
  • Dendrites, axons, and synapses

    • What is the function of the myelin sheath?

  • To receive signals from dendrites
  • To store electrical signals
  • To transmit neurotransmitters
  • To insulate portions of the axon (correct)

    • Which type of glial cells are identified as star-shaped and assist in protecting nervous tissue?

    <p>Astrocytes</p> Signup and view all the answers

    Which neurotransmitters are secreted by postganglionic adrenergic neurons?

    <p>Catecholamines only</p> Signup and view all the answers

    Which part of the brain contains both white and gray matter?

    <p>Cerebrum</p> Signup and view all the answers

    What is the primary role of the Node of Ranvier?

    <p>To allow electrical signals to jump along the axon</p> Signup and view all the answers

    How many pairs of spinal nerves are present in the human body?

    <p>31</p> Signup and view all the answers

    What role do Schwann cells play in the nervous system?

    <p>They insulate portions of the axon in the peripheral nervous system.</p> Signup and view all the answers

    Which of the following correctly describes the function of the preganglionic neurons?

    <p>They exclusively secrete acetylcholine to ganglionic neurons.</p> Signup and view all the answers

    How do electric signals travel along myelinated axons?

    <p>They jump from node to node at the Nodes of Ranvier.</p> Signup and view all the answers

    What is one of the primary functions of the blood-brain barrier?

    <p>To filter harmful compounds from the brain to the bloodstream.</p> Signup and view all the answers

    Which type of receptors do postganglionic neurons use to communicate with target organs when they secrete acetylcholine?

    <p>Muscarinic receptors.</p> Signup and view all the answers

    What distinguishes gray matter from white matter in the brain?

    <p>Concentration of cell bodies.</p> Signup and view all the answers

    Which part of a neuron receives signals from other neurons?

    <p>Dendrite.</p> Signup and view all the answers

    What is primarily responsible for the composition of the blood-brain barrier?

    <p>Endothelial cells and pericytes.</p> Signup and view all the answers

    How many pairs of cervical spinal nerves are present in the human body?

    <p>8 pairs.</p> Signup and view all the answers

    Which component of the blood-brain barrier aids in the repair of nervous tissue?

    <p>Astrocytes.</p> Signup and view all the answers

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