If the Sinoatrial Node Fails in the Heart

question 6

Multiple Choice

If the sinoatrial node fails in the heart,

• A) the heart ceases to beat.
• B) the ventricles will beat at a higher rate.
• C) an artificial pacemaker can correct the problem.
• D) the heartbeat is unaffected.
• E) the atria will not contract.

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Definitions:

Darkness

The absence of light in an environment, affecting visibility and perception.

Circadian Rhythms

Biological processes that display an endogenous, entrainable oscillation of about 24 hours.

Earth's Rotation

The spinning of the Earth on its axis, which takes approximately 24 hours to complete, resulting in day and night.

Organisms

Any living biological entities, such as plants, animals, fungi, or microorganisms.