Podcast
Questions and Answers
What percentage of total body weight does extracellular fluid comprise in a 1-year-old?
What percentage of total body weight does extracellular fluid comprise in a 1-year-old?
- 28% (correct)
- 25%
- 35%
- 45%
Compared to non-pregnant women, by approximately what percentage does plasma volume increase by term in pregnant women?
Compared to non-pregnant women, by approximately what percentage does plasma volume increase by term in pregnant women?
- 60%
- 30%
- 50% (correct)
- 40%
Which of the following best describes the total body water (TBW) percentage in elderly individuals?
Which of the following best describes the total body water (TBW) percentage in elderly individuals?
- 60-65%
- 40-45%
- 70-75%
- 50% (correct)
What proportion of extracellular fluid is made up of interstitial fluid?
What proportion of extracellular fluid is made up of interstitial fluid?
What is the approximate sodium concentration (mEq/L) within the intracellular fluid?
What is the approximate sodium concentration (mEq/L) within the intracellular fluid?
Which of the following statements is correct regarding total body water (TBW) at birth?
Which of the following statements is correct regarding total body water (TBW) at birth?
In young adult females, what percentage of total body weight does blood volume constitute?
In young adult females, what percentage of total body weight does blood volume constitute?
Which of the following has the highest concentration of Potassium?
Which of the following has the highest concentration of Potassium?
Flashcards
Total Body Water (TBW)
Total Body Water (TBW)
The total amount of water in a person's body, varying by age and sex.
Extracellular Fluid (ECF)
Extracellular Fluid (ECF)
Fluid outside cells, constituting about 1/3 of total body water.
Intracellular Fluid (ICF)
Intracellular Fluid (ICF)
Fluid within cells, making up about 2/3 of total body water.
Age-related TBW variation
Age-related TBW variation
Signup and view all the flashcards
Interstitial Fluid
Interstitial Fluid
Signup and view all the flashcards
Intravascular Fluid
Intravascular Fluid
Signup and view all the flashcards
Electrolyte composition in ICF
Electrolyte composition in ICF
Signup and view all the flashcards
Electrolyte composition in ECF
Electrolyte composition in ECF
Signup and view all the flashcards
Study Notes
Total Body Water
- At birth, total body water comprises 70-80% of body weight.
- At 1 year of age, it's 70-75%.
- In adults, males have approximately 60% and females 50-55%.
- Extreme ages (40-45%) have between 40-45% of total body water.
Body Fluid Compartments
- Total body water (TBW) is divided into intracellular and extracellular fluid (ECF).
- Extracellular fluid is subdivided into intravascular (plasma) and interstitial fluid.
- Approximately 1/3 of TBW (or 2/3 of extracellular fluid - ECF) is in the intravascular spaces.
- 3/4 of extracellular fluid (ECF) is interstitial fluid.
- 1/4 of ECF is intravascular fluid.
Fluid Composition
- Table 49-2 shows the composition of different body fluid compartments.
- Values are in milliequivalents per liter (mEq/L) or grams per deciliter (g/dL).
- Gram-molecular weights of important compounds like sodium, potassium, calcium, magnesium chloride, and proteins are given with their concentrations in different body fluid compartments. Examples include intracellular sodium levels, extracellular sodium levels, and interstitial sodium levels.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
