Stack #36815
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| Chemistry | science that deals with the composition of matter
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| Elements | substances from which all matter is made
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| the major elements | greater than 96% of body weight
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| the major elements | oxygen, carbon, hydrogen, nitrogen
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| Oxygen | O
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| Carbon | C
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| Hydrogen | H
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| Nitrogen | N
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| Calcium | Ca
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| Phosphorus | P
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| Potassium | K
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| Sulfur | S
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| Sodium | Na
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| Chlorine | Cl
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| Iron | Fe
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| Atom | the basic unit of matter
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| Molecule | two or more atoms united
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| Compounds | two or more different atoms united
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| Water | universal solvent; the most abundant compound; hydrogen and oxygen; needed by all living things to complete body processes (absorption, secretion, excretion)
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| Mixture | two or more elements or compounds which are not chemically combined
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| Solution | a substance which remains evenly distributed in a solvent, is a mixture but it remains evenly distributed
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| Solvent | the dissolving substance, such as water
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| Solute | the substance that is dissolved
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| Suspension | a mixture that separates if it isn't shaken; Ex: milk of magnesia, salad dressing, blood
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| Colloidal suspension | the molecules do not dissolve but remain distributed in the solvent; Ex: chocolate milk, tea
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| Ions | an atom or a group of atoms with different charges; positive or negative charge
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| Electrolytes | help to maintain pH & fluid balance; must be in exact quantities to maintain homeostasis of the intracellular & extracellular fluids found in the cells & in the body; during chemical reactions in the body, minerals tend to pick up an electrical charge
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| Acids and Bases | the pH scale- how the hydrogen is balanced in the body
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| pH scale | concentration of hydrogen ions; high=acid, low hydrogen=bases
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| acidic | 0-6; gives off a sour taste because it is giving off hydrogen; will turn litmus paper red
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| neutral | 7 on the pH scale
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| base or alkaline | 8-14 on the pH scale; will give bitter taste; will have soapy or slippery feel; collects hydrogen; turns litmus paper blue
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| Tissue fluids | slightly salty; 0.9% salty; NSS(normal saline solution); isotonic solution; bathe the cells; deliver nutrients; return wastes to the blood
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| Buffer | maintains constant pH of a solution; maintains stability of body fluids; allows the tissue fluids to be maintained
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| Different forms of energy within the body | Heat, Mechanical, Electrical, Chemical
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| Heat | regulates body temperature
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| Mechanical | moves food through the system; peristalsis-wave-like motion of the digestive tract used to move food through the system
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| Electrical | electrolytes; nerve conduction; must be balanced
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| Chemical | digestion; respiration; take in oxygen change it to carbon dioxide; digestion- breaking down of food needs chemicals, so does absorption
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Created by:
Supernurse