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 two values are required to calculate cardiac output (CO) for a ventricle?

Stroke volume and heart rate

Blood pressure and heart rate

End-diastolic volume and end-systolic volume

Stroke volume and blood pressure

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Verified step by step guidance

Understand the concept of cardiac output (CO): Cardiac output is the volume of blood pumped by a ventricle per minute. It is a key measure of heart function and is calculated using specific physiological parameters.

Recall the formula for cardiac output: The formula is CO = Stroke Volume (SV) × Heart Rate (HR). This means you need the stroke volume (amount of blood ejected by the ventricle per beat) and the heart rate (number of beats per minute) to calculate CO.

Eliminate incorrect options: Blood pressure is not directly used in the formula for cardiac output, so options involving blood pressure can be ruled out. Similarly, while end-diastolic volume (EDV) and end-systolic volume (ESV) are related to stroke volume, they are not directly used to calculate cardiac output.

Focus on the correct parameters: Stroke volume and heart rate are the two values required to calculate cardiac output, as they directly determine the amount of blood pumped per minute.

Conclude: The correct answer is 'Stroke volume and heart rate,' as these are the two values necessary to calculate cardiac output using the formula CO = SV × HR.