A Patient Is in the Emergency Department for a Severe

question 13

Multiple Choice

A patient is in the emergency department for a severe anxiety attack. Their doctor administers a dose of potassium to control their elevated heart rate. Why would potassium potentially be a treatment for the cardiovascular effects of an anxiety attack?

• A) Excess potassium-ion concentration inhibits signals from the sympathetic nervous system, thereby lowering the heart rate.
• B) Excess potassium-ion concentration acts of the heart to cause a decreased heart rate and increased force of contraction.
• C) Excess potassium-ion concentration acts on the heart to cause a decreased heart rate and a decreased force of contraction.
• D) Excess potassium-ion concentration signals the parasympathetic nervous system directly, thereby lowering the heart rate.

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