Anatomy & Physiology (6th Edition)
6th Edition
ISBN: 9780134156415
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Textbook Question
Chapter 25, Problem 1MC
Body water content is greatest in (a) infants, (b) young adults, (c) elderly adults.
Expert Solution & Answer
Summary Introduction
Introduction:
Two major fluid compartments are present in human body, one is intracellular fluid (ICF) and second is the extracellular fluid (ECF). Two third (2/3) of the total body water is present in ICF, whereas ECF only accounts for the remaining one third (1/3) of total body water. The ECF is further divided into two parts interstitial fluid (75%) and plasma (25%). The concentration of total body water varies between children and adults, depending on the age group.
Answer to Problem 1MC
Correct answer:
The highest water content is present in infants.
Explanation of Solution
Explanation for the correct answer:
Infants and children posses higher water content in the body. They have higher metabolic rates and increased body surface area to mass index, which makes higher turnover of fluids and solutes. Thus, infants and children require more water compare to the adults. Infants constitute 70% water content of their body weight. Hence option (a) is the correct option.
Explanation for the incorrect answers:
Option (b) states that young adults contain highest water content, which is a false statement as infants constitute 70% - 80% water content of their body weight that is greater than young adults (around 60-65%).
Option (c) states that elderly adults contain highest water content, which is a false statement as infants constitute 70% water content of their body weight that is greater than alderly adults (around 50-60%).
Conclusion
Thus it is concluded that highest water content is present in infants i.e. 70% - 80% water content of their total body weight.
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Chapter 25 Solutions
Anatomy & Physiology (6th Edition)
Ch. 25.1 - Which do you have more of, extracellular or...Ch. 25.1 - What is the major cation in the ECF? In ICF? What...Ch. 25.1 - If you eat salty pretzels without drinking, what...Ch. 25.2 - Prob. 6CYUCh. 25.2 - ADH, by itself, cannot reduce an increase in...Ch. 25.2 - For each of the following, state whether it might...Ch. 25.3 - Nathan has Addisons disease (insufficient...Ch. 25.3 - Prob. 9CYUCh. 25.3 - Prob. 10CYUCh. 25.4 - Define acidemia and alkalemia.
Ch. 25.4 - What are the bodys three major chemical buffer...Ch. 25.4 - Joanne, a diabetic patient, is at the emergency...Ch. 25.5 - Reabsorption of HCO3 is always tied to the...Ch. 25.5 - Prob. 14CYUCh. 25.5 - Prob. 15CYUCh. 25.5 - Prob. 16CYUCh. 25.6 - Which two abnormalities in plasma are key features...Ch. 25.6 - How do the kidneys compensate for respiratory...Ch. 25 - Body water content is greatest in (a) infants, (b)...Ch. 25 - Potassium, magnesium, and phosphate ions are the...Ch. 25 - Sodium balance is regulated primarily by control...Ch. 25 - Prob. 4MCCh. 25 - Two main substances regulated by the influence of...Ch. 25 - Two substances regulated by parathyroid hormone.Ch. 25 - Two substances secreted into the proximal...Ch. 25 - Prob. 8MCCh. 25 - Prob. 9MCCh. 25 - Prob. 10MCCh. 25 - Prob. 11MCCh. 25 - The pH of blood varies directly with (a) HCO3, (b)...Ch. 25 - In an individual with metabolic acidosis, a clue...Ch. 25 - Name the body fluid compartments, noting their...Ch. 25 - Prob. 2SAQCh. 25 - Prob. 3SAQCh. 25 - Prob. 4SAQCh. 25 - Prob. 5SAQCh. 25 - Explain how the chemical buffer systems resist...Ch. 25 - Explain the relationship of the following to renal...Ch. 25 - Mr. Heyden, a somewhat stocky 72-year-old man, is...Ch. 25 - Mr. Heyden, a somewhat stocky 72-year-old man, is...Ch. 25 - Mr. Heyden, a somewhat stocky 72-year-old man, is...Ch. 25 - Mr. Heyden, a somewhat stocky 72-year-old man, is...
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