Nervous System Study Questions: Neuron Anatomy and Functions
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Questions and Answers

What are the standard anatomical parts of a neuron?

  • Soma, dendrite, axon; soma contains the nucleus, dendrites receive signals, and axons send signals (correct)
  • Axon hillock, dendrite, soma; axon hillock receives signals, dendrites are the main cell body, and somas send signals
  • Axon, nucleus, cell body; axons receive signals, the nucleus is the main cell body, and cell bodies send signals
  • Dendrite, nucleus, axon; dendrites receive signals, the nucleus is the main cell body, and axons send signals
  • What is the sequence of events that takes place when a neuron fires?

  • Hyperpolarization, resting state, depolarization; hyperpolarization leads to the resting state which then triggers depolarization
  • Resting state, depolarization, hyperpolarization; resting state occurs when the neuron fires, leading to depolarization and then hyperpolarization
  • Depolarization, repolarization, hyperpolarization; depolarization is the neuron firing, followed by repolarization and then hyperpolarization (correct)
  • Resting state, action potential, repolarization; the neuron goes from resting to firing an action potential and then repolarizes
  • What is the role of hyperpolarization in propagating a nerve impulse?

  • Hyperpolarization triggers the initial depolarization in a neuron
  • Hyperpolarization helps in reducing the neuron's excitability after firing (correct)
  • Hyperpolarization is not involved in propagating nerve impulses
  • Hyperpolarization increases the rate of firing in a neuron
  • What is the difference between EPSPs and IPSPs in typical nerve function?

    <p>EPSPs increase membrane potential while IPSPs decrease it</p> Signup and view all the answers

    What are the components of the peripheral nervous system?

    <p>Nerves outside the brain and spinal cord</p> Signup and view all the answers

    How do reflex arcs work?

    <p>Reflex arcs bypass the brain and directly produce a rapid response to a stimulus</p> Signup and view all the answers

    What is the primary function of ligand-gated channels in propagating a nerve impulse?

    <p>Allowing ions to flow in response to neurotransmitter binding</p> Signup and view all the answers

    How do EPSPs differ from IPSPs in the context of typical nerve function?

    <p>EPSPs increase the likelihood of a neuron firing, while IPSPs decrease it</p> Signup and view all the answers

    In neuron function, what role do potassium channels primarily play?

    <p>Restoring the resting membrane potential after an action potential</p> Signup and view all the answers

    What distinguishes the autonomic nervous system from the somatic nervous system?

    <p>Involuntary control of internal organs vs voluntary control of skeletal muscles</p> Signup and view all the answers

    What is the main function of hyperpolarization in propagating a nerve impulse?

    <p>Preventing further action potentials from occurring immediately after one</p> Signup and view all the answers

    How do sympathetic and parasympathetic nervous systems differ in their effects on body functions?

    <p>Sympathetic prepares the body for fight or flight responses, parasympathetic conserves energy and promotes digestion</p> Signup and view all the answers

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