After a stressful event, a client's blood pressure and heart rate rise. Which system is most likely responsible for this physiologic change?
1. The respiratory system
2. The parasympathetic nervous system
3. The acid–base buffer system
4. The autonomic nervous system
Correct Answer: 4
Rationale 1: The respiratory system is not predominantly responsible for the control of heart rate or blood vessel diameter.
Rationale 2: The parasympathetic nervous system is not responsible for a rise in blood pressure or heart rate.
Rationale 3: The acid–base buffer system is not predominantly responsible for the control or heart rate or blood pressure.
Rationale 4: The autonomic nervous system controls the heart rate and blood vessel diameter.
Global Rationale: The autonomic nervous system controls the heart rate and blood vessel diameter. The respiratory system is not predominantly responsible for the control of heart rate or blood vessel diameter. The parasympathetic nervous system is not responsible for a rise in blood pressure or heart rate. The acid–base buffer system is not predominantly responsible for the control or heart rate or blood pressure.
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