ANATOMY
LIMB VASCULATURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Withdrawal of ParaSNS will result in INCREASED Heartrate
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Withdrawal of SNS stimulation will result in DECREASED Heartrate
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Increased SNS activity will result in DECREASED heart rate
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Increased ParaSNS activity will result in DECREASED Heart rate
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Increased SNS Activity will result in INCREASED heart rate
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Detailed explanation-1: -The sympathetic nervous system (SNS) has a wide variety of cardiovascular effects, including heart-rate acceleration, increased cardiac contractility, reduced venous capacitance, and peripheral vasoconstriction.
Detailed explanation-2: -In the heart (beta-1, beta-2), sympathetic activation causes an increased heart rate, the force of contraction, and rate of conduction, allowing for increased cardiac output to supply the body with oxygenated blood.
Detailed explanation-3: -Increased sympathetic activity affects both the heart and the venous system. The effect on the heart is that the cardiac performance curve becomes more sensitive to changes in the pressure in the right atrium and the upper limit for the cardiac output is set higher (Figure 14).