A Level Biology Practice Exam

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What is defined as an abnormal rhythm of the heart?

Bradycardia
Arrhythmia
Hypertension
Tachycardia

The correct answer is: Arrhythmia

The term that describes an abnormal rhythm of the heart is arrhythmia. Arrhythmias occur when the electrical impulses that coordinate heartbeats do not function properly, leading to rhythms that can be too fast, too slow, or irregular. This can affect how the heart pumps blood and may lead to a variety of symptoms or even serious complications. Bradycardia refers specifically to a slow heart rate, while tachycardia refers to a fast heart rate. Hypertension, on the other hand, describes high blood pressure and does not pertain to the rhythm of the heart. Understanding arrhythmias is crucial as they can be symptoms of underlying heart conditions, and their management can be essential for maintaining cardiovascular health.