When the Heart Is in Fibrillation

question 101

Multiple Choice

When the heart is in fibrillation,

• A) the myocardial cells may become damaged from contracting too fast.
• B) the myocardial cells deplete their oxygen supply because they are contracting too fast, and the lactic acid produced damages the myocardial cells.
• C) effective pumping of the ventricles ceases because the myocardial cells fail to work as a team, and the brain cannot get adequate oxygen.
• D) the myocardial cells are contracting together as they should; fibrillation indicates a normal sinus rhythm of 75 beats per minute.
• E) there is no contraction of the myocardium.

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Definitions:

Electromagnetic

Pertaining to or emanating from the interaction of electric and magnetic fields, referring to the full spectrum of waves from radio to gamma rays.

Electroreceptors

Specialized cells or organs in some aquatic animals that allow them to detect electric fields in their environment, aiding in navigation, hunting, and communication.

Mechanoreceptors

Sensory receptors in the body that respond to mechanical pressure or distortion, crucial for senses like touch and hearing.

Thermoreceptors

Sensory receptors in the body that detect changes in temperature, helping to maintain homeostasis.