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Chapter 17: Cardiovascular System Study Guide – ANP

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Study Guide - Smart Notes

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Q1. What are the sources from which blood flows into the upper and lower chambers of the heart? What are the destinations to which these chambers pump blood?

Background

Topic: Heart Anatomy and Blood Flow

This question tests your understanding of the basic structure of the heart and the direction of blood flow through its chambers.

Key Terms:

  • Atria (upper chambers)

  • Ventricles (lower chambers)

  • Veins (vessels bringing blood to the heart)

  • Arteries (vessels carrying blood away from the heart)

Step-by-Step Guidance

  1. Identify the major veins that bring blood into the right and left atria of the heart.

  2. Determine which chambers receive this blood (right atrium and left atrium).

  3. Trace the flow of blood from the atria to the ventricles.

  4. Identify the vessels that carry blood away from the right and left ventricles.

Try solving on your own before revealing the answer!

Q2. Which side of the heart is considered the pulmonary pump/circuit? What is the destination of blood from the pulmonary pump? To which side of the heart does it return?

Background

Topic: Pulmonary Circulation

This question focuses on the pathway of blood through the pulmonary circuit, which is responsible for gas exchange in the lungs.

Key Terms:

  • Pulmonary circuit

  • Right side of the heart

  • Pulmonary arteries and veins

Step-by-Step Guidance

  1. Recall which side of the heart pumps blood to the lungs.

  2. Identify the vessels that carry blood from the heart to the lungs.

  3. Determine which side of the heart receives blood after it returns from the lungs.

Try solving on your own before revealing the answer!

Q3. Which side of the heart is considered the systemic pump/circuit? What is the destination of blood from the systemic pump? To which side of the heart does it return?

Background

Topic: Systemic Circulation

This question tests your knowledge of the systemic circuit, which delivers oxygenated blood to the body.

Key Terms:

  • Systemic circuit

  • Left side of the heart

  • Aorta, systemic veins

Step-by-Step Guidance

  1. Identify which side of the heart pumps blood to the body (excluding the lungs).

  2. Determine the main artery that carries blood from this side of the heart.

  3. Trace the return path of blood from the body back to the heart.

Try solving on your own before revealing the answer!

Q4. What are the three layers of the heart wall and of what types of tissue are they composed? Where are they located?

Background

Topic: Heart Wall Structure

This question examines your understanding of the anatomical layers of the heart and their tissue composition.

Key Terms:

  • Epicardium (outer layer)

  • Myocardium (middle layer)

  • Endocardium (inner layer)

Step-by-Step Guidance

  1. List the three layers of the heart wall from outermost to innermost.

  2. Describe the type of tissue each layer is primarily composed of.

  3. Explain the location of each layer relative to the heart chambers.

Try solving on your own before revealing the answer!

Q5. Where does the coronary sinus deliver blood to?

Background

Topic: Coronary Circulation

This question tests your knowledge of the heart's own blood supply and venous drainage.

Key Terms:

  • Coronary sinus

  • Right atrium

Step-by-Step Guidance

  1. Recall the function of the coronary sinus in the heart's circulation.

  2. Identify the chamber of the heart that receives blood from the coronary sinus.

Try solving on your own before revealing the answer!

Q6. What is the overall pathway of blood flowing through the heart, beginning and ending with the systemic capillaries, and including the valves and great vessels?

Background

Topic: Cardiac Blood Flow Pathway

This question requires you to trace the complete route of blood through the heart, including all major valves and vessels.

Key Terms:

  • Systemic capillaries

  • Vena cavae

  • Pulmonary arteries and veins

  • Aorta

  • Heart valves (tricuspid, pulmonary, mitral, aortic)

Step-by-Step Guidance

  1. Start with deoxygenated blood returning from the body to the heart.

  2. Follow the blood through the right side of the heart, to the lungs, and back to the left side.

  3. Trace the path through the left side of the heart and out to the systemic circulation.

  4. Include the names of all valves and major vessels encountered along the way.

Try solving on your own before revealing the answer!

Q7. Know the sequence of electrical events in the heart: Cardiac conduction pathway through the heart.

Background

Topic: Cardiac Conduction System

This question tests your understanding of how electrical impulses travel through the heart to coordinate contraction.

Key Terms:

  • Sinoatrial (SA) node

  • Atrioventricular (AV) node

  • Bundle of His

  • Bundle branches

  • Purkinje fibers

Step-by-Step Guidance

  1. Identify the origin of the electrical impulse in the heart.

  2. Trace the pathway of the impulse through the conduction system.

  3. Explain how this sequence ensures coordinated contraction of the atria and ventricles.

Try solving on your own before revealing the answer!

Q8. What are the three populations of pacemaker cells in the heart? How do they differ?

Background

Topic: Pacemaker Cells

This question focuses on the specialized cells that initiate and regulate the heartbeat.

Key Terms:

  • SA node cells

  • AV node cells

  • Purkinje fiber cells

Step-by-Step Guidance

  1. List the three main groups of pacemaker cells in the heart.

  2. Describe the location and function of each group.

  3. Explain how their intrinsic firing rates differ.

Try solving on your own before revealing the answer!

Q9. What is the significance of the plateau phase of this action potential?

Background

Topic: Cardiac Action Potential

This question tests your understanding of the unique features of cardiac muscle cell action potentials.

Key Terms:

  • Plateau phase

  • Calcium influx

  • Refractory period

Step-by-Step Guidance

  1. Describe what happens during the plateau phase of a cardiac action potential.

  2. Explain why this phase is important for heart function.

  3. Relate the plateau phase to the prevention of tetanus in cardiac muscle.

Try solving on your own before revealing the answer!

Q10. What are the five waves in an ECG, and what do they represent?

Background

Topic: Electrocardiogram (ECG/EKG)

This question tests your ability to interpret the basic components of an ECG tracing.

Key Terms:

  • P wave

  • QRS complex

  • T wave

  • U wave (if present)

Step-by-Step Guidance

  1. List the five main waves seen on a standard ECG.

  2. Describe what electrical event in the heart each wave corresponds to.

  3. Refer to the relevant figure or table in your lab manual for visual reference.

Try solving on your own before revealing the answer!

Q11. What causes the heart sounds S1 and S2?

Background

Topic: Heart Sounds

This question focuses on the physiological events that produce the characteristic "lub-dub" sounds of the heartbeat.

Key Terms:

  • S1 (first heart sound)

  • S2 (second heart sound)

  • AV valves

  • Semilunar valves

Step-by-Step Guidance

  1. Identify which valves are closing to produce S1 and S2.

  2. Relate these sounds to the phases of the cardiac cycle.

Try solving on your own before revealing the answer!

Q12. What are the four phases of the cardiac cycle? Be able to explain each phase.

Background

Topic: Cardiac Cycle

This question tests your understanding of the sequence of events during one heartbeat.

Key Terms:

  • Ventricular filling

  • Isovolumetric contraction

  • Ventricular ejection

  • Isovolumetric relaxation

Step-by-Step Guidance

  1. List the four phases of the cardiac cycle in order.

  2. Briefly describe what happens to the heart chambers and valves during each phase.

  3. Explain the significance of each phase for blood movement.

Try solving on your own before revealing the answer!

Q13. What is end-diastolic volume (EDV)?

Background

Topic: Cardiac Volumes

This question focuses on the volume of blood in the ventricles at a specific point in the cardiac cycle.

Key Terms:

  • End-diastolic volume (EDV)

  • Diastole

Step-by-Step Guidance

  1. Define what is meant by "end-diastolic volume."

  2. Identify when in the cardiac cycle this volume is measured.

Try solving on your own before revealing the answer!

Q14. What is end-systolic volume (ESV)?

Background

Topic: Cardiac Volumes

This question focuses on the volume of blood remaining in the ventricles after contraction.

Key Terms:

  • End-systolic volume (ESV)

  • Systole

Step-by-Step Guidance

  1. Define what is meant by "end-systolic volume."

  2. Identify when in the cardiac cycle this volume is measured.

Try solving on your own before revealing the answer!

Q15. What is stroke volume? How is stroke volume calculated?

Background

Topic: Stroke Volume

This question tests your understanding of how much blood is pumped out of the ventricle with each heartbeat and how to calculate it.

Key Formula:

Step-by-Step Guidance

  1. Recall the definitions of EDV and ESV.

  2. Set up the formula for stroke volume using these values.

  3. Explain what stroke volume represents physiologically.

Try solving on your own before revealing the answer!

Q16. What is cardiac output? How is cardiac output calculated?

Background

Topic: Cardiac Output

This question tests your ability to calculate the total volume of blood pumped by the heart per minute.

Key Formula:

Step-by-Step Guidance

  1. Recall the definition of stroke volume and heart rate.

  2. Set up the formula for cardiac output using these values.

  3. Explain what cardiac output represents in terms of heart function.

Try solving on your own before revealing the answer!

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