If the SA Node Is Unable to Function

question 57

Multiple Choice

If the SA node is unable to function

• A) an ectopic beat may be initiated by another part of the heart.
• B) the heart rate will be slower.
• C) the AV node will become the pacemaker for the heart.
• D) All of these are possible.
• E) None of these would occur.

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Definitions:

Withdrawal Reflex

A spinal cord-mediated reflex that causes immediate withdrawal from a painful or harmful stimulus.

Muscle Tension

The force generated by a muscle or group of muscles when they contract, which can vary in response to different stimuli or during different types of physical activity.

Dermatomal Maps

Diagrams that show the area of skin supplied by sensory nerves stemming from a single spinal nerve root.

Nerve Damage

Injury to the nerves, often resulting in loss of movement, sensation, or function in the affected area.