Textbook Question
The hormonal stimulus that prompts red blood cell formation is:
a. Serotonin
b. Heparin
c. Erythropoietin
d. Thrombopoietin
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Ch. 17 Blood
Hoehn, Haynes, Abbott12th EditionMarieb Human Anatomy & PhysiologyISBN: 9780138242732
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Table of contents
- Ch. 1 The Human Body: An Orientation25
- Ch. 2 Chemistry Comes Alive24
- Ch. 3 Cells: The Living Units24
- Ch. 4 Tissue: The Living Fabric19
- Ch. 5 The Integumentary System12
- Ch. 6 Bones and Skeletal Tissues19
- Ch. 7 The Skeleton14
- Ch. 8 Joints7
- Ch. 9 Muscles and Muscle Tissue26
- Ch. 10 The Muscular System25
- Ch. 11 Fundamentals of the Nervous System and Nervous Tissue23
- Ch. 12 The Central Nervous System25
- Ch. 13 The Peripheral Nervous System and Reflex Activity30
- Ch. 14 The Autonomic Nervous System16
- Ch. 15 The Special Senses26
- Ch. 16 The Endocrine System26
- Ch. 17 Blood27
- Ch. 18 The Cardiovascular System: The Heart25
- Ch. 19 The Cardiovascular System: Blood Vessels27
- Ch. 20 The Lymphatic System and Lymphoid Organs and Tissues16
- Ch. 21 The Immune System: Innate and Adaptive Body Defenses27
- Ch. 22 The Respiratory System21
- Ch. 23 The Digestive System31
- Ch. 24 Nutrition, Metabolism, and Energy Balance26
- Ch. 25 The Urinary System26
- Ch. 26 Fluid, Electrolyte, and Acid-Base Balance24
- Ch. 27 The Reproductive System24
- Ch. 28 Pregnancy and Human Development25
- Ch. 29 Heredity11
Hoehn, Haynes, Abbott12th EditionMarieb Human Anatomy & PhysiologyISBN: 9780138242732Not the one you use?Change textbook
Chapter 17, Problem 1
The blood volume in an adult averages approximately:
a. 1 L
b. 3 L
c. 5 L
d. 7 L.
Verified step by step guidance1
Understand that blood volume refers to the total amount of blood circulating within an adult human's cardiovascular system.
Recall that the average blood volume in adults is typically measured in liters and varies based on factors such as body size and sex.
Recognize that the average blood volume for an adult is generally around 7-8% of their total body weight.
Use the average adult body weight (approximately 70 kg) to estimate blood volume by calculating 7-8% of this weight, which gives a value close to 5 liters.
Compare the calculated estimate with the given options to identify the closest value representing average adult blood volume.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Average Blood Volume in Adults
The average blood volume in a healthy adult human is about 5 liters. This volume can vary based on factors like body size, sex, and health status, but 5 liters is a commonly accepted standard for an average adult.
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Composition and Function of Blood
Blood is a vital fluid composed of plasma, red and white blood cells, and platelets. It transports oxygen, nutrients, and waste products throughout the body, making its volume critical for maintaining physiological balance and homeostasis.
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Factors Affecting Blood Volume
Blood volume can be influenced by hydration levels, blood loss, and medical conditions. Understanding these factors helps explain why the average volume is an estimate and why it might differ in specific individuals or situations.
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