Select the CORRECT answer. When the baroreceptor reflex is triggered by a decline in blood pressure:Group of answer choicesSympathetic activity increases and cardiac output increases.Peripheral resistance decreases.Sympathetic activity increases.Cardiac output increases.
Question
Select the CORRECT answer. When the baroreceptor reflex is triggered by a decline in blood pressure:Group of answer choicesSympathetic activity increases and cardiac output increases.Peripheral resistance decreases.Sympathetic activity increases.Cardiac output increases.
Solution
The correct answer is: Sympathetic activity increases and cardiac output increases.
Here's why: The baroreceptor reflex is a mechanism our body uses to maintain blood pressure at nearly constant levels. When blood pressure drops, baroreceptors (pressure-sensitive sensors in the walls of the heart and blood vessels) send signals to the brain. In response, the brain increases sympathetic nervous system activity. This leads to an increase in heart rate and strength of heart contractions, which in turn increases cardiac output (the amount of blood the heart pumps per minute). This helps to raise blood pressure back to normal levels.
Similar Questions
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