Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

18. The Heart

Cardiac Cycle

Anatomy & Physiology

18. The Heart

Cardiac Cycle

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Multiple Choice

Which is the correct sequence of events in the cardiac cycle?

Atrial systole, ventricular systole, ventricular diastole

Atrial systole, ventricular diastole, ventricular systole

Ventricular diastole, atrial systole, ventricular systole

Ventricular systole, atrial systole, ventricular diastole

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Verified step by step guidance

Understand the cardiac cycle: The cardiac cycle consists of a series of events that occur in the heart during one heartbeat, including phases of contraction (systole) and relaxation (diastole) of the atria and ventricles.

Identify the phases: The main phases of the cardiac cycle are atrial systole, ventricular systole, and ventricular diastole. Atrial systole is when the atria contract to push blood into the ventricles. Ventricular systole is when the ventricles contract to pump blood out of the heart. Ventricular diastole is when the ventricles relax and fill with blood from the atria.

Sequence the events: The correct sequence of events in the cardiac cycle is important for efficient blood flow. Typically, atrial systole occurs first, followed by ventricular systole, and then ventricular diastole.

Analyze the options: Compare the given options with the typical sequence of the cardiac cycle. Look for the sequence that starts with atrial systole, followed by ventricular systole, and ends with ventricular diastole.

Select the correct sequence: Based on the understanding of the cardiac cycle, choose the option that correctly represents the sequence of atrial systole, ventricular systole, and ventricular diastole.