Nervous System Components and Divisions Quiz
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Questions and Answers

What are the two components of the central nervous system?

  • Cerebellum and thalamus
  • Brain and spinal cord (correct)
  • Dendrites and axons
  • Motor and sensory neurons

    • Into what two pathways can the peripheral nervous system be further divided?

  • Dendritic and axonal pathways
  • Sympathetic and parasympathetic pathways
  • Motor and sensory pathways
  • Somatic and autonomic pathways (correct)

    • What is the function of the myelin sheath?

  • To provide structural support to the neuron
  • To transmit electrical signals between neurons (correct)
  • To store energy for neuronal activities
  • To regulate neurotransmitter release

    • Differentiate between white matter and grey matter.

    <p>Grey matter contains cell bodies while white matter contains myelinated axons.</p> Signup and view all the answers

    What is a reflex arc?

    <p>A sequence of events that leads to an involuntary response to a stimulus.</p> Signup and view all the answers

    What is the threshold level?

    <p>The minimum level of depolarization required to trigger an action potential.</p> Signup and view all the answers

    During depolarization, what is happening at the axon membrane?

    <p>Potassium ions are entering the cell</p> Signup and view all the answers

    What occurs at the synapse?

    <p>Release of neurotransmitters</p> Signup and view all the answers

    What is acetylcholine?

    <p>A neurotransmitter</p> Signup and view all the answers

    What is the refractory period?

    <p>The period of time when a neuron cannot generate another action potential</p> Signup and view all the answers

    Name two positive feedback loops related to the female body.

    <p>Breast milk production and labor contractions</p> Signup and view all the answers

    Define steroid hormones and provide an example.

    <p>Hormones derived from cholesterol; estrogen</p> Signup and view all the answers

    What does the undersecretion of hGH lead to?

    <p>Dwarfism in children and osteoporosis in adults</p> Signup and view all the answers

    Which hormones regulate blood calcium levels?

    <p>Parathyroid hormone (PTH) and calcitonin</p> Signup and view all the answers

    What is the purpose of insulin, and what are its targets?

    <p>To decrease blood sugar levels; liver and muscles</p> Signup and view all the answers

    For which hormone is the stimulus LOW GRADE stress, injury, or exercise?

    <p>Adrenaline; produced by the adrenal cortex</p> Signup and view all the answers

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