Body composition by Andrew M Bambala - UNZA School of Health Sciences - 3rd Year Pharmacology and Toxicology-unza

Description

These academic notes cover Body fluid distribution and composition, authored by Andrew M Bambala for third-year Pharmacology and Toxicology students at the University of Zambia (UNZA) School of Health Sciences. The document begins by detailing the body composition of an average young adult male, breaking down percentages of protein, fat, mineral, and water. It explains the division of total body water into extracellular fluid (ECF) and intracellular fluid (ICF), providing their approximate volumes and proportions. The material clearly outlines the distinct ionic compositions of ECF and ICF, highlighting sodium as the chief cation in ECF and potassium in ICF, supported by detailed tables comparing cation and anion concentrations in plasma, interstitial fluid, and intracellular fluid. Key concepts such as osmolality and osmolarity are defined and differentiated, with equations provided for calculating osmolarity and explaining the clinical relevance of the osmotic gap. The notes discuss the physiological importance of maintaining ECF volume and osmolarity for blood pressure and cellular function, the regulation of water and electrolyte balance, and the hormonal control involving ADH, aldosterone, and atrial natriuretic hormone. It also covers disorders of water balance, including dehydration, hypotonic hydration (water intoxication), and edema, explaining their causes and consequences. This resource is an essential study aid for university students in biomedical sciences, providing fundamental knowledge for understanding fluid and electrolyte physiology pertinent to pharmacology and clinical practice. Download these detailed notes to solidify your comprehension of body fluid compartments for exam preparation.