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1. Which of these will increase stabilization of a colloid particle?
Add a little salt (eg. increases solubility of globulins)
Adding the ionic strength by adding
Adding water soluble organic solvent (destroys the lyosphere)
Changing the Ph to its isoelectric point for amphoteric colloid particles like proteins
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2. Which purpose of the gel is correct?
polyacrylamind gel - electrophoretic separation of nucleic acids
Silica gel - chromatography, drying
Agarose gel - electrophoretic separation of protiens
3. In the venule end which type of pressure is higher?
Blood pressure > Oncotic pressure so tissue fluid leaves the cappillaries
Blood pressure < Oncotic pressure so tissue fluid returns back into the cappillaries
Blood pressure < Oncotic pressure so tissue fluid leaves the cappillaries
Blood pressure > Oncotic pressure so tissue fluid returns back into the cappillaries
4. what is a protective colloid?
proteins in the blood are protective colloids of Calcium phosphate and calcium carbonate leading to its precipitation (forming gall stones)
A protective colloid are substances that form a hydrophilic colloid solution stabilizing the hydrophobic colloid particles.
A stubstance that specifically stabilises emulsions eg glycocholic (facilate absorption of dietary lipids)
A protective colloid are substances that form a hydrophobic colloid solution stabilizing the hydrophillic colloid particles.
5. which of these is not a way to classify Colloids?
Mobility of coloids eg solutions (free in their motion as in a true solution) and gel (particles arranged in a solid net e.g fibrin gel, gelatine
Organic colloids - colloid particles (eg DNA, viruses, vesicles) or colloid systems(- blood plasma, lymph, cytosol)
Structure of colloid - Molecular (sungle large molecule eg. proteins/starch) or micellar (particles composed from smaller amphillic ones eg. soap/phospholipids
Interaction with water - hydrophobic and hydrophillic
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