What Causes Muscles to Twitch

question 123

Multiple Choice

 What causes muscles to twitch?

• A) depolarization of the muscle fiber produced by an influx of sodium ions
• B) depolarization of the muscle fiber produced by an influx of potassium ions
• C) hyperpolarization of the muscle fiber produced by an influx of calcium ions
• D) hyperpolarization of the muscle fiber produced by an outflow of potassium ions

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Definitions:

Compounds

Substances formed from the chemical combination of two or more elements in a fixed ratio, characterized by specific properties.

Characteristic Stretch

Refers to a specific vibration in a molecule observed in IR spectroscopy, corresponding to the bond or functional group unique to that molecule.

Characteristic Stretch

Specific vibrational movements in molecules observed in infrared spectroscopy that help identify functional groups.

Mass Spectrometer

An analytical instrument used to identify substances within a sample by sorting gaseous ions based on their mass-to-charge ratios.