NSER 7110 QUESTIONS & ANSWERS
Cardiac output - Answer -volume of blood ejected by the heart each minute
CO is determined by - Answer -heart rate and stroke volume
Heart rate and stroke volume are controlled by - Answer -autonomic nervous system
The heart is under constant control of the parasympathetic nervous system via -
Answer -the vagus nerve
The PNS is the - Answer -"zen" of the ANS, keeping everything mellow
The sympathetic nervous system (SNS) is the - Answer -"stimulant" of the ANS.
The ANS increases or decreases - Answer -heart rate and stroke volume based on
physical and chemical demands to ensure adequate cardiac output
The parasympathetic nervous system decreases heart rate by - Answer -reducing SA
node firing and slowing AV nodal conduction.
PNS minimally decreases stroke volume by decreasing contractility in the - Answer -
atria
PNS does not affect contractility in the - Answer -ventricles
The sympathetic nervous system increases heart rate and stroke volume by: - Answer -
1. Stimulating alpha (a) receptors
2. Stimulating the Beta 1 (B1) receptors
SNS: Stimulating alpha (a) receptors in the peripheral vessels to - Answer -
vasoconstrict
SNS Stimulating the Beta 1 (B1) receptors in the heart to - Answer -increase SA node
firing, increase AV nodal conduction, and increase contractility
SNS Stimulating the Beta 1 (B1) receptors in the heart also - Answer -stimulates Beta 2
(B2) in the lungs to bronchodilate
Baroreceptors - Answer -sensory receptors located in the aortic arch and carotid
arteries
Baroreceptors detect changes in - Answer -BP
Cardiac output - Answer -volume of blood ejected by the heart each minute
CO is determined by - Answer -heart rate and stroke volume
Heart rate and stroke volume are controlled by - Answer -autonomic nervous system
The heart is under constant control of the parasympathetic nervous system via -
Answer -the vagus nerve
The PNS is the - Answer -"zen" of the ANS, keeping everything mellow
The sympathetic nervous system (SNS) is the - Answer -"stimulant" of the ANS.
The ANS increases or decreases - Answer -heart rate and stroke volume based on
physical and chemical demands to ensure adequate cardiac output
The parasympathetic nervous system decreases heart rate by - Answer -reducing SA
node firing and slowing AV nodal conduction.
PNS minimally decreases stroke volume by decreasing contractility in the - Answer -
atria
PNS does not affect contractility in the - Answer -ventricles
The sympathetic nervous system increases heart rate and stroke volume by: - Answer -
1. Stimulating alpha (a) receptors
2. Stimulating the Beta 1 (B1) receptors
SNS: Stimulating alpha (a) receptors in the peripheral vessels to - Answer -
vasoconstrict
SNS Stimulating the Beta 1 (B1) receptors in the heart to - Answer -increase SA node
firing, increase AV nodal conduction, and increase contractility
SNS Stimulating the Beta 1 (B1) receptors in the heart also - Answer -stimulates Beta 2
(B2) in the lungs to bronchodilate
Baroreceptors - Answer -sensory receptors located in the aortic arch and carotid
arteries
Baroreceptors detect changes in - Answer -BP
