Body Fluid Compartments and Homeostasis Flashcards
1
Q
Name the different body fluid compartments
A
A. Intracellular
B. Extracellular
1. Interstitial fluid
2. Plasma
C. Transcellular- fluid in transit
the lumens of intestinal
tract, lungs, kidneys, and
bladder
2
Q
Approximate volume of fluid in plasma
A
3 liters
3
Q
Approximate volume of fluid in interstitial fluid
A
13 liters Bone- 2 liters Dense connective tissue- 3 liters Bulk- 8 liters
4
Q
Approximate volume of fluid in transcellular fluid
A
1 liter
5
Q
Approximate volume of fluid in intracellular fluid
A
25 liters
6
Q
Describe the endothelial cells
A
- Between plasma and interstitial fluid
- Permeable to water and everything except large proteins
7
Q
Describe epithelial cells (membrane)
A
- Between interstitial fluid and transcellular fluid
- Very selective (regulatory)
- Allows stuff to move in one direction
8
Q
Describe plasma membrane
A
Very impermeable to electrolytes
9
Q
How do four principle organs interface the internal environment
A
- Contents from external environment enter the lungs and intestinal tract
- Waste from the internal environment is eliminated by the kidneys, lungs, intestinal tract, and skin
10
Q
Describe the balance between intake and output of water in the body
A
- Intake occurs through metabolism of fatty acids, water in food, and drink
- Output occurs through feces, insensible (vaporization in lungs and skin) water, and urine
- Output is regulated by kidneys
11
Q
Concentration of major ions in blood plasma
A
Na= 142 mM K= 4.4 mM Cl= 102 mM Protein= 1 mM Osmolality= 290 mOsm
12
Q
Concentration of major ions in interstitial fluid
A
Na= 145 mM K= 4.5 mM Cl= 116 mM Protein=0 mM Osmolality= 290 mOsm
13
Q
Concentration of major ions in intracellular fluid
A
Na= 15 mM K= 120 mM Cl= 20 mM Protein= 4 mM Osmolality= 290 mOsm
