Neurons and Nervous System Quiz
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Questions and Answers

What is the main driving force for the diffusion of ions through ion channels?

  • Semipermeability of the cell membrane
  • Sodium-potassium pump
  • Concentration gradient (correct)
  • Electrical gradient

What process actively pumps out sodium from the cell?

  • Electrostatic force
  • Diffusion
  • Nuclear fusion
  • Sodium-potassium pump (correct)

What occurs during depolarization of the cell membrane?

  • Hyperpolarization
  • Anions going out
  • Voltage gated potassium channels opening
  • Cations going in (correct)

What happens when the threshold is met at the axon hillock?

<p>Voltage gated Na+ channels open up and sodium enters the cell (C)</p> Signup and view all the answers

How is information encoded by the nervous system?

<p>Changes in pattern frequency (C)</p> Signup and view all the answers

What is behavior defined as in the context of the nervous system?

<p>The actions/reactions/responses (D)</p> Signup and view all the answers

What are the two main types of cells within the brain?

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

What is the function of an oligodendrocyte or Schwann cell?

<p>Speed up signal transmission with the myelin sheath (A)</p> Signup and view all the answers

What is the main function of an interneuron in the nervous system?

<p>Transmit information between neurons within the CNS and coordinate outputs (C)</p> Signup and view all the answers

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

<p>Mechanical and metabolic support (D)</p> Signup and view all the answers

Which type of neuron has multiple dendrites and a single neuron?

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

What is the function of microglia in the nervous system?

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

What is the role of satellite cells in the nervous system?

<p>Support groups of cell bodies of neurons within ganglia of the PNS (B)</p> Signup and view all the answers

What is the main function of neurilemma?

<p>Potential regeneration of damaged axons (C)</p> Signup and view all the answers

What is one major difference between sensory afferent neurons and association interneurons?

<p>Sensory afferent neurons transmit information from receptors of PNS towards CNS while association interneurons transmit information between neurons within CNS (B)</p> Signup and view all the answers

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