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:

Computerized Analysis

The use of computer technology to examine data or systems in detail in order to identify patterns, trends, or important information, often employed in research and business sectors.

Atrial Depolarization

The excitement and contraction caused by the SA node at the beginning of the cardiac cycle.

Cardiology

The branch of medicine dealing with disorders of the heart as well as parts of the circulatory system.

Cardiac Cycle

The sequence of events that occur in the heart during one complete heartbeat, including contraction (systole) and relaxation (diastole) phases.