NS 132 SQ 16 - Minerals Study Questions Synopsis This lecture examines the major trace minerals What functions do minerals serve in what foods can

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Minerals: Study Questions Synopsis : This lecture examines the major & trace minerals. What functions do minerals serve & in what foods can they be found? These & other questions are addressed. Mineral deficiencies & their effects on human health are examined as well as the toxic effects ō ingesting too much ō a mineral. The first part ō the lecture is an overview (i.e. first three sections) & goes quickly. Consequently, there is just one audio link for the content corresponding to those sections. Textbook readings: Chapter 9 I. Salt a. Minerals occur as salts b. Dissociate into ions c. Water follows salt Salt What are salts? salts : association ō charged ions in stable molecule; dissociate into ions in solns. - Minerals occur as salts. - K + + Cl - = KCl - Na + + Cl - = NaCl What are ions? What do we mean by dissociation? ions : charged particles dissociation : splitting ō salts into components in aqueous soln. (H 2 O) Salt dissociate into ions in solutions. II. Electrolytes a. Pure water doesn’t conduct electricity b. Ions do conduct electricity c. Ions = electrolytes Electrolytes Does pure water conduct electricity? No , pure water does not conduct electricity. Do ions conduct electricity? Yes , What are electrolytes? electrolytes = ions a. All fluids contain dissolved minerals b. Osmosis i. Water follows salt [water movement diagram] ii. Movement ō water from area ō low solute concentration to area ō high concentration thru a membrane [solute diagram ] c. Osmotic pressure causes fluid shifts d. e. Cells pump minerals to move water
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Do body fluids contain dissolved minerals? Yes , body fluids contain dissolved minerals. What is osmosis? What do we mean when we say water follows salt? osmosis : movement ō water from area ō low to high solute concentration through membrane osmotic pressure fluid shifts “Water follows salt” means ions attract water, w/c is a polar molecule w/ (+) H & (-) O poles/regions. - NaCl (neutral charge) → Na + (positive charge) & Cl - (negative charge) - Na + surrounded w/ O (-) - Cl - surrounded w/ H (+) What is osmotic pressure? How does it cause fluid shifts? osmotic pressure : force generated by attraction ō solute on solvent; causes osmosis - pull creates pressure fluid shifts also protein) maintain right vol. ō fluid i.e. How do cells move water? Body cells move water from one side ō membrane to another by moving salts & water follows. IV. Acid-base balance
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This note was uploaded on 03/29/2008 for the course NUTRI SCI 132 taught by Professor Anderson during the Spring '08 term at Wisconsin.

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NS 132 SQ 16 - Minerals Study Questions Synopsis This lecture examines the major trace minerals What functions do minerals serve in what foods can

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