2 -CHEMICAL LEVEL - CHAPTER2 CHEMICALLEVEL OFTHEHUMANBODY...

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CHAPTER 2 CHEMICAL LEVEL  OF THE HUMAN BODY
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CHEMICAL LEVEL protons/neutrons/electrons----- elements-------atoms-------molecules---- compounds Major organic compounds –  Carbohydrates Proteins  Lipids
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CHEMICAL ELEMENTS Oxygen - major component of organic and inorganic  compounds, needed to produce ATP Carbon - primary component of organic compounds Hydrogen – apart of organic compounds, as an ion  (proton), influences body pH Nitrogen- in proteins and nucleic acids Calcium - in bones and teeth, needed for muscle  contraction, nerve impulse and blood clotting Phosphorus - found in ATP, bones and teeth Potassium- major positive ion in ICF, needed for  muscle and nerve activity
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CHEMICAL ELEMENTS Sulfur - component of muscle proteins Sodium - major cation in ECF, important  for H2O balance Chlorine- most abundant anion in ECF Magnesium - in bone, for muscle  relaxation Iron- part of hemoglobin (which  transports oxygen in red blood cells)
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TRACE ELEMENTS Present in the body in small amounts Aluminum, Boron, Chromium, Cobalt,  Copper, Fluorine, Iodine, Manganese,  Molybdenum, Selenium, Silicon, Tin,  Vanadium, Zinc
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STRUCTURE OF AN ATOM Nucleus - dense core of an atom Proton - positive charge in nucleus Neutrons - neutral charge in nucleus Electron -  negative charge surrounding  nucleus
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CHEMICALS Atom- smallest unit of matter (200,000  on a period (.))
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MATTER matter- occupies space and has mass exists in 3 states =  solid (ICE) liquid  (WATER) gas (VAPORS) Mass – can be measured
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NUMBER Atomic number - # of protons in nucleus Mass number - sum of its protons and  neutrons Isotopes - atoms of an element with 
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This note was uploaded on 06/29/2009 for the course PHYSIOLOGY 001 taught by Professor Kelly during the Summer '09 term at East Los Angeles College.

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2 -CHEMICAL LEVEL - CHAPTER2 CHEMICALLEVEL OFTHEHUMANBODY...

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