Neurophysiology and Neurochemistry Quiz
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Questions and Answers

Which type of summation occurs when multiple neurons send EPSPs to exceed the threshold?

  • Temporal summation
  • EPSPs
  • IPSPs
  • Spatial summation (correct)
  • Which of the following decreases the likelihood of generating an action potential?

  • Temporal summation
  • Spatial summation
  • IPSPs (correct)
  • EPSPs
  • Which type of communication between neurons involves the release of neurotransmitters into the synaptic cleft?

  • Chemical communication (correct)
  • Synapses
  • Gap junctions
  • Electrical communication
  • Where do synapses occur between in neurons?

    <p>All of the above</p> Signup and view all the answers

    What allows ions to move directly between glial cells?

    <p>Gap junctions</p> Signup and view all the answers

    Which of the following is an example of a psychoactive drug?

    <p>Serotonin reuptake inhibitors</p> Signup and view all the answers

    What is the role of agonists in neuron communication?

    <p>They have the same effect as neurotransmitters</p> Signup and view all the answers

    What is the main function of receptors in neuron communication?

    <p>They bind to agonists</p> Signup and view all the answers

    How do psychoactive drugs affect the process of receptor binding and neuron communication?

    <p>They alter the process of receptor binding</p> Signup and view all the answers

    What is neuroplasticity?

    <p>The changing of the size of neurons and synapses based on experience</p> Signup and view all the answers

    Which of the following is responsible for maintaining the resting membrane potential of neurons?

    <p>Sodium-potassium pumps</p> Signup and view all the answers

    What is the function of myelin sheaths in neural communication?

    <p>To insulate neurons and increase communication efficiency</p> Signup and view all the answers

    Which type of matter consists of non-myelinated neurons?

    <p>Grey matter</p> Signup and view all the answers

    What is the role of voltage gated channels during an action potential?

    <p>To allow the flow of sodium and potassium ions</p> Signup and view all the answers

    What is the function of neurotransmitters in neural communication?

    <p>To release neurotransmitters</p> Signup and view all the answers

    Study Notes

    Neurophysiology, Neurochemistry, Visualizing Neural Activity, Resting Membrane Potential, Action Potential, Sodium-Potassium Pumps, Voltage Gated Channels, Refractory Period, Myelin and Saltatory Conduction, Oligodendrocytes, Grey Matter and White Matter, Postsynaptic Potentials, Neurochemistry/Neuropharmacology, Neural Integration

    • Neurophysiology studies the generation of electrical signals called action potentials
    • Resting membrane potential is the baseline physiological condition of neurons, maintained by the phospholipid bilayer and the movement of ions
    • Sodium, potassium, calcium, and chloride ions play important roles in neurophysiology
    • Neurotransmitters are released into the synapse to pass signals from one neuron to the next
    • Visualizing neural activity is challenging but can be done using brain scans, PET imaging, and calcium imaging
    • Resting potential of a neuron is -70 millivolts, maintained by the movement of potassium ions in and out of the cell
    • Action potentials begin at the axon hillock when the threshold value is reached, causing depolarization
    • Sodium-potassium pumps actively transport sodium out and potassium into the cell, requiring ATP
    • Voltage gated channels open and close to allow the flow of sodium and potassium ions during an action potential
    • The refractory period follows an action potential, during which the neuron cannot fire again
    • Myelin sheaths, made up of oligodendrocytes, insulate neurons and increase the efficiency of neural communication through saltatory conduction
    • Grey matter consists of non-myelinated neurons, while white matter consists of myelinated neurons
    • Postsynaptic potentials, either excitatory or inhibitory, determine whether a neuron will fire an action potential
    • Neural integration involves the integration of multiple inputs from presynaptic neurons to determine whether an action potential will be generated

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    Description

    Test your knowledge of neurophysiology and neurochemistry with this quiz! Explore topics such as visualizing neural activity, resting membrane potential, action potentials, sodium-potassium pumps, voltage gated channels, myelin and saltatory conduction, and more. Challenge yourself to understand the intricate workings of the nervous system and how neurons communicate.

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