Fluid Comp And Homeostasis Flashcards
Name the four body fluid compartments.
1) Intracellular fluid (ICF)
2) Extracellular fluid (ECF)
3) Interstitial fluid
4) Plasma
How much of the body’s total body weight is comprised of water?
60%
Of the total body water (TBW), what is the ratio of ICF to ECF?
2:1
(2/3 TBW ICF)
(1/3 TBW ECF)
Extracellular fluid (ECF) is comprised of _______ and ________.
Interstitial fluid.
Plasma.
What % of ECF does interstitial fluid comprise?
80%
What % of ECF does plasma comprise?
20%
What separates the ICF from the ECF?
Cell membrane or plasma membrane.
What is intracellular fluid comprised of? (3 examples)
Sodium.
Potassium.
Protein concentrations.
The composition of ECF is similar to _______.
Seawater.
What separates interstitial fluid from blood plasma?
Capillary wall.
Both plasma and interstitial fluid contain similar molecules/ions (I.e. Na, Ca, K). What is the one component plasma contains that interstitial fluid contains very little of?
Plasma proteins.
What are plasma proteins important for?
Keeping fluid inside the cardiovascular system.
What is it called when there is too much interstitial fluid?
Edema.
Define homeostasis.
The relative constancy of the internal environment.
In homeostasis, variables do not stay _______ and constantly ________ around a ________ ________.
Constant.
Fluctuates.
Normal range.
Homeostasis is in a state of _______ _______.
Dynamic constancy.