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

Arteries

Anatomy & Physiology

19. The Blood Vessels

Arteries

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Problem 1d

Textbook Question

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
Muscular arteries control blood flow at the tissue level.

Verified step by step guidance

Step 1: Understand the role of muscular arteries in the circulatory system. Muscular arteries are medium-sized arteries that distribute blood to specific organs and tissues. They are characterized by a thick tunica media containing smooth muscle cells.

Step 2: Recall the primary function of muscular arteries. Their main role is to regulate blood flow and pressure by vasoconstriction (narrowing of the vessel) or vasodilation (widening of the vessel). However, they do not directly control blood flow at the tissue level.

Step 3: Identify the vessels responsible for controlling blood flow at the tissue level. Blood flow at the tissue level is primarily regulated by arterioles, which are smaller branches of arteries. Arterioles adjust blood flow to tissues by altering their diameter in response to local signals such as oxygen demand or metabolic activity.

Step 4: Evaluate the statement provided in the problem. The statement 'Muscular arteries control blood flow at the tissue level' is false because muscular arteries distribute blood to organs, while arterioles are responsible for fine-tuning blood flow at the tissue level.

Step 5: Correct the false statement to make it true. The corrected statement would be: 'Arterioles control blood flow at the tissue level.'

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Key Concepts

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

Muscular Arteries

Muscular arteries, also known as distributing arteries, are medium-sized blood vessels that primarily regulate blood flow to specific organs and tissues. They have a thicker muscular layer compared to elastic arteries, allowing them to constrict and dilate effectively, thus controlling blood distribution based on the body's needs.

Blood Flow Regulation

Blood flow regulation refers to the mechanisms by which the body adjusts the distribution and volume of blood to various tissues. This process is crucial for maintaining homeostasis and is influenced by factors such as vascular resistance, blood pressure, and the metabolic demands of tissues.

Tissue Perfusion

Tissue perfusion is the process of delivering blood to capillary beds in tissues, ensuring that they receive adequate oxygen and nutrients. Effective perfusion is vital for cellular function and is influenced by the diameter of blood vessels, particularly the role of muscular arteries in adjusting blood flow to meet the metabolic needs of different tissues.

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Related Practice

Textbook Question

The unpaired arteries supplying blood to the visceral organs include:

(a) The adrenal, renal, and lumbar arteries

(b) The iliac, gonadal, and femoral arteries

(d) All of these

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Textbook Question

The paired arteries supplying blood to the body wall and other structures outside the abdominopelvic cavity include the:

a) Left gastric, hepatic, splenic, and phrenic arteries

(b) Adrenal, colic, lumbar, and gonadal arteries

(d) Celiac, left gastric, and superior and inferior mesenteric arteries

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Textbook Question

Distinguish between elastic arteries, muscular arteries, and arterioles relative to location, histology, and functional adaptations.

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Textbook Question

A 60-year-old man is unable to walk more than 100 yards without experiencing severe pain in his left leg; the pain is relieved by resting for 5–10 minutes. He is told that the arteries of his leg are becoming occluded with fatty material and is advised to have the sympathetic nerves serving that body region severed. Explain how such surgery might help to relieve this man's problem.

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Textbook Question

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

Arteries are the exchange vessels of the cardiovascular system.

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Textbook Question

Match the following arteries with the correct description.

__Radial artery

__Celiac trunk

__Basilar artery