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

19. The Blood Vessels

Introduction to Blood Vessels

Anatomy & Physiology

19. The Blood Vessels

Introduction to Blood Vessels

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Multiple Choice

Which of the following is true of blood vessel length?

Blood vessel length does not affect blood flow resistance.

Longer blood vessels increase resistance to blood flow.

Shorter blood vessels decrease blood pressure.

Blood vessel length is constant and does not change.

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Verified step by step guidance

Understand the relationship between blood vessel length and resistance: Blood vessel length is directly proportional to resistance. This means that as the length of a blood vessel increases, the resistance to blood flow also increases.

Consider the formula for resistance in blood vessels: Resistance (R) is calculated using the formula R = (8 * η * L) / (π * r^4), where η is the blood viscosity, L is the length of the vessel, and r is the radius of the vessel.

Analyze the impact of longer blood vessels: According to the formula, increasing the length (L) of the blood vessel will increase the resistance (R), assuming all other factors remain constant.

Evaluate the statement about shorter blood vessels: Shorter blood vessels would decrease resistance, not necessarily blood pressure directly, as blood pressure is influenced by multiple factors including cardiac output and vessel elasticity.

Clarify the misconception about blood vessel length being constant: Blood vessel length can change over time due to growth, weight gain, or other physiological changes, so it is not constant.