Fluid and Electrolyte Balance

Lungs and Kidneys

• Key organs involved in maintaining the balance of fluids and electrolytes in the body.

Fluid Balance

• Balanced primarily through two processes:
    - Breathing (Respiratory Function)
    - Kidney Function

pH Levels

• Normal blood pH level is maintained between 7.35 - 7.45.
    - Below 7.35: Indicates acidity (Excess CO2).
    - Above 7.45: Indicates alkalinity (Bicarbonate).

Electrolytes

• Significant for maintaining body functions, especially in cardiac health.
    - Key Electrolytes:
      - Chloride
      - Sodium
      - Potassium
      - Calcium
      - These electrolytes are crucial because they affect the heart's function.
    - Role: They contribute to the formation of the "electrolyte" used in bodily functions.

Cellular Membranes

• Various fluid compartments are critical for physiological functions.
    - Intravascular Fluid:
      - Refers to fluid contained within blood vessels.
      - Acts as the body's "highway" for nutrient and oxygen transport.
    - Intracellular Fluid:
      - Fluid found inside the cells.
      - Composes over 60% of total body fluids.
    - Interstitial Fluid:
      - Located just outside of the cells, acting as a medium for exchange.
    - Extracellular Fluid:
      - All fluids found outside cells.
      - Abnormal accumulation (e.g., edema) indicates disease states.

Osmotic Pressure

• The pressure required to prevent the flow of a solvent across a semi-permeable membrane.
    - Important for maintaining fluid balance within the body.
    - Low Albumin Levels:
      - Albumin is a protein; low levels can lead to fluid leakage out of blood vessels.
      - Treatment may include administering albumin to help retain fluid within the vascular compartment.

Localized Edema

• Condition characterized by the accumulation of excess fluid in the interstitial spaces.

Key Clinical Labs

• Blood laboratory tests that are crucial in assessing fluid and kidney function include:
    - Glucose
    - Blood Urea Nitrogen (BUN)
    - Creatinine

Insulin Function

• Insulin plays a crucial role in energy metabolism by facilitating the uptake of glucose into cells, enabling energy production.
  

Processes of Fluid Movement

• Fluids move across membranes through various processes, particularly diffusion.
    - Diffusion:
      - Refers to the movement of substances from a region of higher concentration to a region of lower concentration across a semi-permeable membrane.

Solutions in Biological Context

• Consist of two main components:
    - Solute (Soldiers):
      - Particles that are dissolved within a solution.
    - Solvent:
      - The liquid that dissolves the solute.

Note: Always remember that the movement of fluids and solutes plays a critical role in physiological functions and homeostasis within the body.