Domanda del libro di testo
The lowest pressure in the systemic circuit occurs in the:
a. Arteries
b. Arterioles
c. Capillaries
d. Venules
e. Veins
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Ch. 18 The Cardiovascular System II: The Blood Vessels
Amerman2nd EditionHuman Anatomy & PhysiologyISBN: 9780136873822
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TOC.tableOfContents
- Ch. 1 Introduction to Anatomy and Physiology26
- Ch. 2 The Chemistry of Life38
- Ch. 3 The Cell55
- Ch. 4 Histology47
- Ch. 5 The Integumentary System30
- Ch. 6 Bones and Bone Tissue36
- Ch. 7 The Skeletal System40
- Ch. 8 Articulations19
- Ch. 9 The Muscular System36
- Ch. 10 Muscle Tissue and Physiology29
- Ch. 11 Introduction to the Nervous System and Nervous Tissue28
- Ch. 12 The Central Nervous System42
- Ch. 13 The Peripheral Nervous System41
- Ch. 14 The Autonomic Nervous System and Homeostasis31
- Ch. 15 The Special Senses39
- Ch. 16 The Endocrine System42
- Ch. 17 The Cardiovascular System I: The Heart30
- Ch. 18 The Cardiovascular System II: The Blood Vessels43
- Ch. 19 Blood32
- Ch. 20 The Lymphatic System and Immunity45
- Ch. 21 The Respiratory System27
- Ch. 22 The Digestive System27
- Ch. 23 Metabolism and Nutrition7
- Ch. 24 The Urinary System39
- Ch. 25 Fluid, Electrolyte, and Acid-Base Homeostasis39
- Ch. 26 The Reproductive System10
- Ch. 27 Development and Heredity5
Amerman2nd EditionHuman Anatomy & PhysiologyISBN: 9780136873822Non è quello che usi tu?Cambia libro di testo
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Amerman 2nd EditionCh. 18 The Cardiovascular System II: The Blood VesselsProblema 5
Amerman 2nd EditionCh. 18 The Cardiovascular System II: The Blood VesselsProblema 5Capitolo 18, Problema 5
Which of the following would produce a decrease in blood pressure?
a. Increased cardiac output
b. Vasodilation
c. Vasoconstriction
d. Increased blood volume
Guida verificata passo dopo passo1
Understand the relationship between blood pressure and the factors listed in the options. Blood pressure is influenced by cardiac output, vascular resistance, and blood volume.
Analyze the effect of increased cardiac output (option a). Cardiac output is the amount of blood the heart pumps per minute. Increased cardiac output typically raises blood pressure because more blood is being pushed through the vessels.
Examine the effect of vasodilation (option b). Vasodilation refers to the widening of blood vessels, which decreases vascular resistance. Lower resistance allows blood to flow more easily, leading to a decrease in blood pressure.
Consider the impact of vasoconstriction (option c). Vasoconstriction is the narrowing of blood vessels, which increases vascular resistance. Higher resistance makes it harder for blood to flow, leading to an increase in blood pressure.
Evaluate the effect of increased blood volume (option d). Blood volume is the total amount of blood circulating in the body. An increase in blood volume raises blood pressure because there is more fluid exerting pressure on the vessel walls.
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Blood Pressure Regulation
Blood pressure is regulated by the balance between cardiac output and vascular resistance. Cardiac output refers to the volume of blood the heart pumps per minute, while vascular resistance is influenced by the diameter of blood vessels. Understanding how these factors interact is crucial for determining what influences blood pressure.
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6:12
Partial Pressure
Vasodilation
Vasodilation is the process by which blood vessels widen, leading to a decrease in vascular resistance. This widening allows for increased blood flow and can result in lower blood pressure. It is often triggered by various factors, including the release of certain hormones and neurotransmitters.
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Percorso guidato
2:39Step 3: Vasodilation
Vasoconstriction
Vasoconstriction is the narrowing of blood vessels, which increases vascular resistance and can lead to an increase in blood pressure. This process is typically mediated by the contraction of smooth muscle in the vessel walls and is influenced by factors such as stress, cold temperatures, and certain hormones.
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Percorso guidato
05:07Vasoconstriction & Vasodilation
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