16 Questions
What percentage of body weight does water constitute in a 70kg man?
~60%
Which component regulates water distribution and exchange in tissues and blood?
Na+, K+, Cl-, HCO3- and proteins
What physiological function does water serve by maintaining the three-dimensional structures of biomolecules?
Organizes cellular membranes
Which property of water makes it the most important biological solvent?
Strong cohesive properties
What does polarity determine?
Solubility, hydrophilicity, and distribution of nutrients
What is responsible for the distribution of electrolytes and water-soluble materials in the blood and tissues?
Water
What happens to nonpolar molecules in relation to water?
They are repulsed away from water
What is the main function of stable micelles (lipoprotein particles-vesicles)?
Increase the water solubility of lipids, cholesterol, and drugs
How are molecules with both polar and nonpolar groups arranged in round vesicles of lipoprotein particles?
Polar groups outside and nonpolar groups in the core
What is the clinical relevance of excess common salt (Na+ Cl-) intake?
Increases water retention in the body and blood pressure
What is the function of hydrophobic attraction?
Pushes away nonpolar groups to aggregate away from water
What determines the arrangement of fatty acids in stable micelles?
Polar and nonpolar groups
What is the function of phospholipids, proteins, and bile salts in the digestive system?
Emulsifying agents for lipid digestion
What determines the transport of cholesterol and lipid-soluble compounds in blood as lipoprotein particles?
Arrangement of polar and nonpolar groups in round vesicles
What is the clinical relevance of body water distribution?
Related to water intake and regulated by hormones
What determines the surface and core composition of micelles and membranes?
Hydrophilic and hydrophobic properties of molecules
Test your knowledge of general chemistry with this quiz based on the premed curriculum at CMHS, UAE University. Explore concepts such as water distribution in the human body, intracellular and extracellular fluids, and the role of ions and proteins.
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