Fill in the blanks:1. Blood is considered a colloid because it contains ____________ in the plasma. 2. Most of these are produced by the ____________ . 3. Collectively, these substances exert ____________ pressure and prevent the loss of ____________ from the blood as it moves through the capillaries. 4. The pressure exerted by the plasma proteins is called colloid osmotic pressure. This force is responsible for moving fluids ____________ and preventing excess fluid loss between blood capillaries and the interstitial fluid. 5. f plasma protein levels decrease, colloid osmotic pressure will ____________ .