Neuron Ion Channel Physiology
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Questions and Answers

What is the ionized form trying to do?

  • Enter the Cytoplasm through K Channels
  • Enter the Mitochondria through Ca Channels
  • Stay in the Nucleus
  • Leave the Cytoplasm through Na Channels (correct)

    • Why did the ionized form block the Na Channels?

  • Because it bonded with the Na Channels
  • Because it was not ionized
  • Because it wanted to stay in the Cytoplasm
  • Because it couldn't leave the Cytoplasm (correct)

    • What happened to the Na Channels?

  • They were destroyed
  • They were blocked (correct)
  • They were created
  • They were opened

    • What is the location where the ionized form is trying to leave?

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

    What type of Channels is the ionized form trying to use?

    <p>Na Channels</p> Signup and view all the answers

    What is an advantage of having less bleeding during a surgical operation?

    <p>It makes the surgical field good for the surgeon</p> Signup and view all the answers

    What is a drawback of high BP during a surgical operation?

    <p>It leads to more bleeding</p> Signup and view all the answers

    What is an advantage of having less absorption during a surgical operation?

    <p>It results in less toxicity</p> Signup and view all the answers

    What is a drawback of having more bleeding during a surgical operation?

    <p>It makes the surgical field bad for the surgeon</p> Signup and view all the answers

    What is an advantage of having less toxicity during a surgical operation?

    <p>It leads to less absorption</p> Signup and view all the answers

    What is the effect of adding Epinephrin to anesthetic drugs?

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

    What is the original effect of anesthetic drugs?

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

    What is the condition associated with the original anesthetic drugs?

    <p>Low blood pressure</p> Signup and view all the answers

    What is the purpose of adding Epinephrin to anesthetic drugs?

    <p>To counteract low blood pressure</p> Signup and view all the answers

    What is the result of combining anesthetic drugs with Epinephrin?

    <p>Vasoconstriction and high blood pressure</p> Signup and view all the answers

    In which patients is N2O contraindicated?

    <p>Those with a pneumothorax or closed air space in the body</p> Signup and view all the answers

    What is a contraindication for the use of N2O?

    <p>Tympanic membrane graft</p> Signup and view all the answers

    What is a type of obstruction where N2O is contraindicated?

    <p>Closed loop bowel obstruction</p> Signup and view all the answers

    What is another condition where N2O is contraindicated?

    <p>Air embolism</p> Signup and view all the answers

    What is the reason for contraindicating N2O in certain patients?

    <p>Risk of expansion of closed air space</p> Signup and view all the answers

    What is the pressure required for Positive Pressure Ventilation (PPV) in Laryngeal Mask Airway (LMA)?

    <p>20 cm H₂0</p> Signup and view all the answers

    What is the primary objective of using Laryngeal Mask Airway (LMA)?

    <p>To provide a secure airway</p> Signup and view all the answers

    What is the indication for using Laryngeal Mask Airway (LMA)?

    <p>Difficulty in bag-valve-mask ventilation</p> Signup and view all the answers

    What is the advantage of using Laryngeal Mask Airway (LMA)?

    <p>Requires minimal setup and equipment</p> Signup and view all the answers

    What is the contraindication for using Laryngeal Mask Airway (LMA)?

    <p>Full stomach</p> Signup and view all the answers

    Study Notes

    Anesthetics and Vasodilation

    • Ionized form blocked from leaving cytoplasm through Na channels, so epinephrin is added to drugs for vasoconstriction effect.

    Comparison of Vasodilator and Vasoconstrictor Drugs

    • Vasodilator (Original Drugs)
      • Low blood pressure
      • More bleeding
      • Bad surgical field for surgeon
      • More absorption
      • More toxicity
    • Vasoconstrictor (Drugs with Epinephrin)
      • High blood pressure
      • Less bleeding
      • Good surgical field for surgeon
      • Less absorption
      • Less toxicity

    Laryngeal Mask Airway (LMA)

    • Requires PPV >20 cm H₂O.

    Contraindications of N₂O

    • Patients with pneumothorax
    • Patients with eye bubble
    • Patients with tympanic membrane graft
    • Patients with closed loop bowel obstruction
    • Patients with air embolism
    • Patients with any other closed air space in the body.

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    Description

    This quiz is about the ionized form's movement in cytoplasm and the role of Na channels in neuron physiology. It explores the mechanism of blocking Na channels and its implications on neuron function.

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