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Questions and Answers
What percentage of total body water is typically found in adults?
What percentage of total body water is typically found in adults?
- 40-45%
- 60% in males, 50-55% in females (correct)
- Up to 85%
- 70-75%
At what age is total body water approximately 70-75%?
At what age is total body water approximately 70-75%?
- Extreme age
- Adulthood
- At birth
- At 1 year of age (correct)
At what age is total body water up to 85%?
At what age is total body water up to 85%?
- At birth (correct)
- Extreme age
- Adulthood
- At 1 year of age
What fraction of total body water does extracellular fluid represent?
What fraction of total body water does extracellular fluid represent?
In children 6 months of age and older, interstitial fluid represents what fraction of extracellular fluid?
In children 6 months of age and older, interstitial fluid represents what fraction of extracellular fluid?
In children 6 months of age and older, what fraction of extracellular fluid does plasma represent?
In children 6 months of age and older, what fraction of extracellular fluid does plasma represent?
What is the gram-molecular weight of Sodium?
What is the gram-molecular weight of Sodium?
What is the intravascular concentration of Sodium (in mEq/L)?
What is the intravascular concentration of Sodium (in mEq/L)?
What is the intracellular concentration of Potassium (in mEq/L)?
What is the intracellular concentration of Potassium (in mEq/L)?
What is the interstitial concentration of Chloride (in Meq/L)?
What is the interstitial concentration of Chloride (in Meq/L)?
Which age group has the highest percentage of total body water (TBW)?
Which age group has the highest percentage of total body water (TBW)?
Which of the following correctly lists the body fluid compartments?
Which of the following correctly lists the body fluid compartments?
The percentage of blood volume is higher in neonates than young adults.
The percentage of blood volume is higher in neonates than young adults.
In pregnancy, blood and plasma volumes increase by 45% and 50% respectively by term.
In pregnancy, blood and plasma volumes increase by 45% and 50% respectively by term.
Flashcards
Total Body Water (TBW)
Total Body Water (TBW)
The total volume of water in the body, expressed as a percentage of body weight.
TBW at Birth
TBW at Birth
Up to 85% (70-80%) of body weight in newborns.
TBW at 1 Year
TBW at 1 Year
70-75% of body weight by one year of age.
TBW in Adults
TBW in Adults
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TBW in Elderly
TBW in Elderly
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Extracellular Fluid (ECF)
Extracellular Fluid (ECF)
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Interstitial Fluid
Interstitial Fluid
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Intravascular Fluid
Intravascular Fluid
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Intracellular Fluid
Intracellular Fluid
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Sodium in ECF
Sodium in ECF
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Potassium in ICF
Potassium in ICF
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Calcium in Body Fluids
Calcium in Body Fluids
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Fluid Composition of TBW
Fluid Composition of TBW
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ECF Composition
ECF Composition
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Age-Related Variation
Age-Related Variation
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Pregnancy Blood Volume
Pregnancy Blood Volume
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Blood Volume in Neonates
Blood Volume in Neonates
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6-month Blood Volume
6-month Blood Volume
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Fluid Compartments Diagram
Fluid Compartments Diagram
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Fluid Volume Ratios
Fluid Volume Ratios
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Fluid Balance Importance
Fluid Balance Importance
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Age Effects on Body Water
Age Effects on Body Water
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ECF vs. ICF Comparison
ECF vs. ICF Comparison
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Fluid Distribution
Fluid Distribution
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Main Electrolytes in Body Fluids
Main Electrolytes in Body Fluids
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Study Notes
Total Body Water
- At birth, total body water is up to 85% (70-80%) of body weight.
- At 1 year of age, total body water is 70-75%
- Adult male total body water is about 60%
- Adult female total body water is 50-55%
- Extreme age (elderly) total body water is 40-45%
Body Fluid Compartments
- Total body water (TBW) is divided into extracellular fluid (ECF) and intracellular fluid.
- ECF is further divided into interstitial fluid (ISF) and intravascular fluid.
- ISF (3/4 ECF) accounts for 3/4 of the total extracellular fluid.
- Intravascular fluid(1/4 ECF)accounts for 1/4 of the total extracellular fluid.
Composition of Fluid Compartments
- Table 49-2 details the composition of different fluid compartments (intracellular and extracellular) in miliequivalents per liter (mEq/L).
- Sodium levels in extracellular fluid are approximately 145 mEq/L and 10 mEq/L in intracellular fluid.
- Potassium levels are 4 mEq/L in extracellular fluid and 140 mEq/L in intracellular fluid
- Calcium levels in extracellular fluid are approximately 3 mEq/L with less than 1 mEq/L in intracellular fluid.
- Chloride levels in extracellular fluid are about 105 mEq/L and 4 mEq/L in intracellular fluid.
- Bicarbonate levels are 24 mEq/L in extracellular fluid and 10 mEq/L in intracellular fluid
- Phosphorus levels are approximately 75 mEq/L in intracellular fluid and 2mEq/L in extracellular fluids
- Protein level variations between compartments exist
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Description
This quiz explores the various aspects of total body water, including its percentage at different life stages and the composition of body fluid compartments. Additionally, it delves into the distinctions between extracellular and intracellular fluids and their electrolyte compositions. Test your knowledge on these vital concepts related to human physiology.
