Cardiac: Autonomic Nervous System Effects on Heart Rate

What does Cardiac Output depend on?

• Heart rate and blood pressure

• Heart rate and stroke volume

• Blood pressure and stroke volume

• Blood pressure and respiratory rate

Which pathway is associated with heart rate control?

• Beta2-adrenergic receptor-mediated pathway

• Beta1-adrenergic receptor-mediated pathway

• Alpha-adrenergic receptor-mediated pathway

• Muscarinic receptor-mediated pathway

Tags

NGSS.HS-LS1-3

What is the role of muscarinic receptor activation in heart rate regulation?

• It increases heart rate by activating sympathetic pathways.

• It has no effect on heart rate regulation.

• It decreases heart rate by inhibiting sympathetic pathways.

• It decreases heart rate by activating parasympathetic pathways.

Tags

NGSS.HS-LS1-3

What effect does a muscarinic agonist have on SA nodal action potential?

• It increases the frequency of action potentials.

• It decreases the frequency of action potentials.

• It has no effect on the action potentials.

• It stabilizes the action potentials without changing the frequency.

What does CO stand for in the context of cardiac performance?

• Cardiac Output

• Cardiac Overdrive

• Cardiac Obstruction

• Cardiac Oscillation

What is the definition of Stroke Volume (SV)?

• The volume of blood pumped by one ventricle in a given period of time

• The volume of blood received by one atrium per beat

• The volume of blood pumped by both ventricles in one minute

• The volume of blood filtered by the kidneys per minute

How is Cardiac Output (CO) calculated?

• CO = HR (beats/min) + SV (mL/beat)

• CO = HR (beats/min) / SV (mL/beat)

• CO = HR (beats/min) x SV (mL/beat)

• CO = HR (beats/min) - SV (mL/beat)

Tags

NGSS.HS-LS1-3

If the average resting heart rate (HR) is 72 bpm and the Stroke Volume (SV) is 70 mL/beat, what is the Cardiac Output (CO)?

• 5040 mL/min

• 3500 mL/min

• 10040 mL/min

• 7072 mL/min

Which of the following is a way to decrease heart rate (HR) based on the activity of the autonomic nervous system (ANS)?

• Muscarinic Agonist

• Muscarinic Antagonist

• Beta 1 Agonist

• Beta 1 Antagonist

Tags

NGSS.HS-LS1-3

What effect does a Muscarinic Antagonist have on heart rate (HR)?

• Decreases HR

• Increases HR

• No effect on HR

• Fluctuates HR