Podcast
Questions and Answers
What occurs during the depolarization phase of an action potential?
What occurs during the depolarization phase of an action potential?
- The nerve membrane becomes less permeable to sodium ions.
- Potassium ions rapidly move into the extracellular fluid.
- Sodium ions rapidly enter the intracellular fluid. (correct)
- The nerve cell returns to a negative internal charge.
What is the primary mechanism of action for local anesthetics?
What is the primary mechanism of action for local anesthetics?
- They inhibit the function of the sodium pump.
- They increase the nerve membrane's permeability to potassium ions.
- They reduce the nerve membrane's permeability to sodium ions. (correct)
- They enhance the movement of sodium ions into the nerve cell.
What does phase three of the action potential involve?
What does phase three of the action potential involve?
- The nerve cell becomes electrically positive compared to the outside.
- Na⁺ is actively transported into the cell by sodium pumps.
- The nerve membrane becomes more permeable to Na⁺.
- K⁺ ions diffusely leave the cell, leading to repolarization. (correct)
Which of the following local anesthetics is also known as 'Marcaine'?
Which of the following local anesthetics is also known as 'Marcaine'?
During the resting state of a nerve cell, what describes the charges inside and outside the cell?
During the resting state of a nerve cell, what describes the charges inside and outside the cell?
What is the primary purpose of administering local anesthesia during dental hygiene care?
What is the primary purpose of administering local anesthesia during dental hygiene care?
Which of the following statements about local anesthetic agents is correct?
Which of the following statements about local anesthetic agents is correct?
What ions are primarily involved in the physiology of nerve conduction affected by local anesthetics?
What ions are primarily involved in the physiology of nerve conduction affected by local anesthetics?
In which scenario is local anesthesia most likely to be required?
In which scenario is local anesthesia most likely to be required?
Which option is NOT a characteristic of local anesthesia?
Which option is NOT a characteristic of local anesthesia?
What is the role of the sodium pump in nerve conduction?
What is the role of the sodium pump in nerve conduction?
Which type of anesthesia is distinctly different from local anesthesia?
Which type of anesthesia is distinctly different from local anesthesia?
What may indicate that a client requires local anesthesia?
What may indicate that a client requires local anesthesia?
Flashcards
Action Potential
Action Potential
A rapid sequence of changes in a nerve's membrane involving depolarization and repolarization.
Resting State
Resting State
When the nerve membrane is polarized with a negatively charged interior and positively charged exterior.
Depolarization
Depolarization
Phase where sodium ions enter the nerve cell, reversing its electrical charge.
Repolarization
Repolarization
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Local Anesthetics Action
Local Anesthetics Action
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Local Anesthesia
Local Anesthesia
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Role of Local Anesthesia in Dental Hygiene
Role of Local Anesthesia in Dental Hygiene
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Local Complications
Local Complications
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Systemic Complications
Systemic Complications
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Nerve Conduction Physiology
Nerve Conduction Physiology
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Sodium Pump
Sodium Pump
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Chemical Barrier
Chemical Barrier
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Indications for Local Anesthesia
Indications for Local Anesthesia
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