Cells Inorganic System

• The cell (protoplasm) combination of true and a colloidal solution
• The cell protoplasm components could be insoluble or soluble
• Filterability - particles of colloidal solution can pass through ordinary filter paper but not through parchment membrane
• Negligible Osmotic Pressure - particles are comparatively small therefore they have negligible osmotic pressure
• Tyndall Phenomenon - colloidal solution possesses Tyndall effect
• Brownian movement - suspended particles of a colloidal solution are observed to be in continuous, rapid vibratory motion
• Electrical charges - colloidal particles are electrically charged, the charged being distributed over the surface of the entire particle
• Surface tension - molecules in the interior of a homogenous liquid are attached in all directions by surrounding molecules so they can move freely in all direction
• While surface molecules are attracted more towards the the center of the liquid making the surface molecules more compact.
• The force by which the surface molecule are held is called the surface tension
• Osmosis - whenever a semi-permeable membrane separates two solutions of unequal concentrations, the fluid tends to flow from the side of low osmotic pressure to that of higher osmotic pressure until an osmotic equilibrium is established
• Hypertonic cell tends to shrink

  Hypotonic cell tends to swell
• Diffusion - interpenetration of molecules between two substances occurs whenever the solute distributes itself uniformly into the solvent
• Small molecules and ions move faster than macromolecules
• The rate of diffusion of substances is dependent on the molecular size, weight, shape and the concentration gradient
• Dialysis - when a semi-permeable membrane allows the passage of the crystalloids but not the colloids
• The rate of dialysis depends on the size of the pores, temperature, electrical charge, area of dialyzer, and the relative concentration on the two sides of the membrane