교과서 질문
The two pressures within the systemic arterial circuit are the_____ pressure and _____ pressure. The difference between these two pressures is the_____ pressure.
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Ch. 18 The Cardiovascular System II: The Blood Vessels
Amerman3rd EditionHuman Anatomy & PhysiologyISBN: 9780138247201, 9780138247928, 9780138201814
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TOC.tableOfContents
- Ch. 1 Introduction to Anatomy and Physiology24
- Ch. 2 The Chemistry of Life37
- Ch. 3 The Cell54
- Ch. 4 Histology46
- Ch. 5 The Integumentary System30
- Ch. 6 Bones and Bone Tissue36
- Ch. 7 The Skeletal System40
- Ch. 8 Articulations19
- Ch. 9 The Muscular System35
- Ch. 10 Muscle Tissue and Physiology29
- Ch. 11 Introduction to the Nervous System and Nervous Tissue28
- Ch. 12 The Central Nervous System41
- 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 Heart28
- Ch. 18 The Cardiovascular System II: The Blood Vessels43
- Ch. 19 Blood32
- Ch. 20 The Lymphatic System and Immunity41
- 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
Amerman3rd EditionHuman Anatomy & PhysiologyISBN: 9780138247201, 9780138247928, 9780138201814당신이 사용하는 게 아니라요?교과서 변경
18장, 문제 4
Which of the following factors would increase peripheral resistance?
a. Increased blood viscosity
b. Shorter vessel
c. Vasodilation
d. An increase in vessel radius
검증된 단계별 안내1
Understand the concept of peripheral resistance: Peripheral resistance refers to the resistance to blood flow in the blood vessels, primarily influenced by vessel diameter, blood viscosity, and vessel length.
Analyze the effect of blood viscosity: Increased blood viscosity (thicker blood) leads to greater resistance because thicker blood is harder to move through vessels. This factor increases peripheral resistance.
Evaluate the impact of vessel length: Shorter vessels reduce the distance blood must travel, which decreases resistance. Therefore, shorter vessels do not increase peripheral resistance.
Examine the role of vasodilation: Vasodilation refers to the widening of blood vessels, which decreases resistance by increasing the vessel diameter. This factor reduces peripheral resistance.
Consider the effect of vessel radius: An increase in vessel radius decreases resistance because resistance is inversely proportional to the fourth power of the radius, as described by Poiseuille's law: \( R = \frac{8 \eta L}{\pi r^4} \), where \( R \) is resistance, \( \eta \) is viscosity, \( L \) is vessel length, and \( r \) is radius. Therefore, an increase in vessel radius reduces peripheral resistance.
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주요 개념
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Peripheral Resistance
Peripheral resistance refers to the resistance to blood flow in the small blood vessels, primarily arterioles. It is a crucial factor in determining blood pressure and is influenced by the diameter of the blood vessels, blood viscosity, and the overall length of the vascular system. Increased peripheral resistance can lead to higher blood pressure and is a key consideration in cardiovascular health.
추천 영상:
3:33
Peripheral Nervous System
Blood Viscosity
Blood viscosity is a measure of the thickness and stickiness of blood, which affects how easily it flows through the vessels. Higher viscosity means that the blood is thicker, which increases resistance to flow and can elevate peripheral resistance. Factors such as dehydration or increased red blood cell count can lead to increased blood viscosity.
추천 영상:
가이드 코스
6:11Functions of Blood
Vessel Radius
The radius of a blood vessel significantly impacts peripheral resistance, as described by Poiseuille's law. A smaller radius increases resistance, while a larger radius decreases it. Vasodilation (widening of blood vessels) decreases resistance, whereas vasoconstriction (narrowing of blood vessels) increases it, making vessel radius a critical factor in regulating blood flow and pressure.
추천 영상:
가이드 코스
4:59Blood Vessels
관련 실천
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교과서 질문
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a. Increased cardiac output
b. Vasodilation
c. Vasoconstriction
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교과서 질문
Match the following terms with the correct definition.
____ Auricle
____ Aorta
____ Coronary sinus
____ Papillary muscle
____ Fossa ovalis
____ Pectinate muscle
____ Venae cavae
____ Pulmonary trunk
____ Chordae tendineae
____ Pulmonary veins
a. Drainage point for the coronary veins
b. Extensions that attach papillary muscles to valves
c. Remnant of a hole present in the fetal interatrial septum
d. Two largest veins of the systemic circuit
e. Flaplike extension from the right or left atrium
f. Finger-like projections of ventricular muscle
g. Main artery of the pulmonary circuit
h. Veins that drain the pulmonary circuit
i. Largest artery of the systemic circuit
j. Ridges of muscle in the atria
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