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

Electrical Conduction System of the Heart

Anatomy & Physiology

18. The Heart

Electrical Conduction System of the Heart

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Multiple Choice

Which of the following is correct about the filling of the ventricles during the cardiac cycle?

Ventricular filling is primarily passive, occurring during ventricular diastole.

The majority of ventricular filling occurs during atrial systole.

Ventricular filling is an active process requiring energy expenditure.

Ventricular filling is completed during ventricular systole.

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Verified step by step guidance

Understand the phases of the cardiac cycle: The cardiac cycle consists of systole (contraction) and diastole (relaxation) phases for both atria and ventricles.

Identify ventricular diastole: During ventricular diastole, the ventricles are relaxed, allowing blood to flow passively from the atria into the ventricles.

Recognize the role of atrial systole: Atrial systole occurs towards the end of ventricular diastole, where the atria contract to push additional blood into the ventricles, contributing to the final phase of ventricular filling.

Clarify the passive nature of ventricular filling: The majority of ventricular filling is passive, occurring during ventricular diastole, without requiring energy expenditure.

Distinguish between ventricular diastole and systole: Ventricular filling is completed before ventricular systole begins, as systole involves the contraction of ventricles to pump blood out of the heart.