Nervous System and Nerve Impulse Quiz
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Questions and Answers

What is the function of neurons in the nervous system?

  • Produce neurotransmitters
  • Receive and transmit nerve impulses (correct)
  • Control the diameter of axons
  • Regulate neurotransmitter release
  • Which of the following ions is more abundant inside the axon during resting potential?

  • Ca2+
  • Cl-
  • K+ (correct)
  • Na+
  • In a myelinated axon, where are action potentials only produced?

  • At the nodes of Ranvier (correct)
  • At the dendrites
  • At the myelin sheath
  • At the axon terminals
  • Which of the following neurotransmitters is associated with feelings of reward and pleasure?

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

    What type of channels cause changes in membrane permeability in response to neurotransmitters?

    <p>Ligand-gated (chemically-gated) channels</p> Signup and view all the answers

    What is the central coordinating unit of the nervous system that includes the brain and spinal cord?

    <p>Central nervous system (CNS)</p> Signup and view all the answers

    Which lobe of the cerebrum is responsible for the primary auditory functions?

    <p>Temporal lobe</p> Signup and view all the answers

    Which part of the brain plays a key role in homeostasis by controlling hunger, sleep, thirst, and body temperature?

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

    What is the function of the limbic system in the brain?

    <p>Joins emotions with higher functions</p> Signup and view all the answers

    Which part of the brain integrates eye, ear, joint, and muscle information?

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

    What is the function of the Reticular Activating System (RAS) in the brain?

    <p>Regulates alertness</p> Signup and view all the answers

    Which division of the Peripheral Nervous System controls involuntary responses like reflexes?

    <p>Autonomic Division</p> Signup and view all the answers

    What is the main function of neuroglia in the nervous system?

    <p>Providing support and protection for neurons</p> Signup and view all the answers

    During the action potential of a neuron, what happens when potassium gates open?

    <p>Potassium ions flow out of the axon, causing repolarization</p> Signup and view all the answers

    Which type of synapse involves a direct connection between two cells through gap junctions?

    <p>Electrical synapse</p> Signup and view all the answers

    What is the primary factor that affects the velocity of nerve impulse transmission in neurons?

    <p>The diameter of the axon</p> Signup and view all the answers

    What is synaptic integration in neurons?

    <p>The summation of inhibitory and excitatory signals received by a neuron</p> Signup and view all the answers

    Which division of the nervous system includes nerves and ganglia?

    <p>Peripheral nervous system (PNS)</p> Signup and view all the answers

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