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 Hemodynamics

Anatomy & Physiology

19. The Blood Vessels

Introduction to Hemodynamics

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Problem 14a

Textbook Question

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
Arterioles reflexively dilate when blood pressure increases.

Verified step by step guidance

Step 1: Understand the role of arterioles in regulating blood pressure. Arterioles are small blood vessels that control blood flow and pressure by constricting or dilating. This process is part of autoregulation, which helps maintain consistent blood flow to tissues.

Step 2: Recall the physiological response of arterioles to changes in blood pressure. When blood pressure increases, arterioles typically constrict (not dilate) to reduce blood flow and maintain homeostasis. This is known as the myogenic response.

Step 3: Evaluate the statement provided. The statement claims that arterioles reflexively dilate when blood pressure increases. Based on the myogenic response, this statement is false.

Step 4: Correct the false statement. The corrected statement should read: 'Arterioles reflexively constrict when blood pressure increases to maintain consistent blood flow.'

Step 5: Review the concept of autoregulation and the myogenic response to ensure a clear understanding of how arterioles respond to changes in blood pressure.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Arteriolar Response to Blood Pressure

Arterioles are small blood vessels that regulate blood flow and pressure. When blood pressure increases, arterioles typically respond by constricting to prevent excessive blood flow and maintain homeostasis. This reflexive response is crucial for protecting capillaries and ensuring adequate perfusion of tissues.

Homeostasis in the Cardiovascular System

Homeostasis refers to the body's ability to maintain stable internal conditions despite external changes. In the cardiovascular system, this involves regulating blood pressure, heart rate, and blood vessel diameter to ensure that organs receive sufficient blood supply while preventing damage from high pressure.

Negative Feedback Mechanisms

Negative feedback mechanisms are processes that counteract changes in the body to maintain equilibrium. In the context of blood pressure regulation, when an increase in blood pressure is detected, the body activates mechanisms such as vasoconstriction of arterioles to lower the pressure back to normal levels, illustrating the principle of negative feedback.

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Mark the following statements as true or false. If a statement is false, correct it to make a true statement.Arterioles reflexively dilate when blood pressure increases.

Key Concepts

Arteriolar Response to Blood Pressure

Homeostasis in the Cardiovascular System

Negative Feedback Mechanisms

Watch next

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
Arterioles reflexively dilate when blood pressure increases.