Module 2-Midterm- Fluids

Question 1

Describe the Body Fluid Compartments

Answer 1

Divided into 2 major compartments:
-Intracellular (everything inside the cell)
-Extracellular (everything outside the cell)
Extracellular compartment further divided into:
-Interstitial (directly outside, bathing cells)
-blood plasma (watery portion of blood)

Question 2

Body Fluid Compartment Portions

Answer 2

• for an average 70kg (154lbs) person, the total body water found in all compartments is 42L
• Intracellular contains 67% or 28L
• Extracellular contains 26.4% or 11L
• Plasma contains 6.6% or 3L

Question 3

Describe Plasma

Answer 3

• 92% water
• 8% proteins, ions, nutrients, gases, and waste
• colloidal solutions: components are suspended
• suspended substances include:
  - proteins ( albumins, fibrinogen, globulins)
• volume remains constant
• water intake through the digestive tract closely matches water loss from skin, kidneys, lungs, and digestive tract

Question 4

Chemical composition of Body Fluids

Answer 4

• big difference between ion composition between intracellular and extracellular
• minimal difference between ion concentration in plasma and interstitial fluid