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 Heart2h 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

19. The Blood Vessels

Introduction to Hemodynamics

Anatomy & Physiology

19. The Blood Vessels

Introduction to Hemodynamics

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Multiple Choice

Which of the following physiological changes would likely occur in someone’s blood vessels when they begin an intense exercise session?

Rate of blood flow needs to increase, so the ΔP will increase & the resistance will increase.

Rate of blood flow needs to decrease, so the ΔP will decrease & the resistance will decrease.

Rate of blood flow needs to increase, so the ΔP will increase & the resistance will decrease.

Rate of blood flow needs to decrease, so the ΔP will increase & the resistance will decrease.

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Verified step by step guidance

Understand the relationship between blood flow, pressure difference (ΔP), and resistance using the formula: Blood Flow = ΔP / Resistance.

Recognize that during intense exercise, the body's demand for oxygen and nutrients increases, necessitating an increase in blood flow to the muscles.

To increase blood flow, the pressure difference (ΔP) across the blood vessels must increase. This is achieved by the heart pumping more forcefully and/or more frequently.

Simultaneously, the resistance in the blood vessels should decrease to facilitate easier blood flow. This is typically achieved through vasodilation, where blood vessels widen to reduce resistance.

Conclude that the correct physiological response during intense exercise is an increase in blood flow, an increase in ΔP, and a decrease in resistance, aligning with the correct answer provided.

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