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Local Anesthesia in Dental Hygiene

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Questions and Answers

What is the primary mechanism of action for modern local anesthetics?

Preventing both nerve impulse generation and conduction. (correct)
Enhancing nerve impulse conduction.
Increasing nerve impulse generation.
Stimulating blood flow around nerve cells.

Which of the following best describes local anesthesia?

Induces a temporary loss of consciousness to reduce pain.
Stimulates electrical activity in the brain to override pain signals.
Results in the loss of sensation in a specific area of the body without loss of consciousness. (correct)
Increases nerve impulse transmission to diminish pain perception.

What is the impact of the sodium pump on the environment inside a nerve cell?

It increases the positive charge by allowing free movement of sodium.
It causes no change in the environment.
It creates a negatively charged environment by moving sodium ions out. (correct)
It creates a balanced ion concentration, maintaining a neutral charge.

In nerve conduction physiology, what role do potassium ($K^+$) and sodium ($Na^+$) ions play?

<p>They are equally concentrated across nerve cell membranes and involved in nerve conduction. (C)</p> Signup and view all the answers

When is administering local anesthesia most appropriate during dental hygiene care?

<p>For therapeutic scaling and root planing or when clients experience tooth or soft tissue sensitivity. (A)</p> Signup and view all the answers

Flashcards

Local Anesthesia

Loss of sensation in a specific body area without loss of consciousness.

Clients Requiring Local Anesthesia

Not all patients need local anesthesia; it's used for certain dental procedures.

Key Ions in Nerve Conduction

Potassium (K+) and Sodium (Na+) ions are crucial for generating nerve impulses.

Electrical Potential in Nerves

Difference in charge inside and outside the nerve cell crucial for impulse generation.

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Nerve Impulse Generation

Occurs when the sodium pump creates a charge difference across the nerve membrane.