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BIOS 135 Chapter 1
1. Anatomy:
Answer Study of Structure and relationships among structures
2. Physiology:
Answer Study of function of body structures
3. Levels of Organization:
Answer Atom -> Molecule -> Cells -> tissue -> organs -> organ system -> organism
4. Characteristics of Life:
Answer Reproduction and Growth Respiration & circulation Movement & responses Digestion, Absorption, Assimilation, Excretion
5. Bodily Requirements:
Answer Water, Food, Oxygen, Heat, Pressure
6. Simplest level of organization (in chemical structures):
Answer Atoms, Ions, Mole- cules
7. Major Elements in the body (>98%):
Answer Oxygen (65%) carbon (18%) hydrogen (10%) nitrogen (3%) calcium (1.5%) phosphorus (1%)
8. Lesser elements in the body (<1%):
Answer sulfur (.25%) 1 / 2
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potassium (.20%) sodium (.15%) chlorine (.15%) magnesium (.05%) iron (.006%)
9. Atom Composition:
Answer Protons - positive charge Electrons - negative charge Neutrons - no charge
10. Positively/Negatively charged Atoms:
Answer Ions (+cations) (-anions)
11. Electrolyte:
Answer any compound that releases ions in water
12. Three types of electrolytes:
Answer Acids, Bases, Salts
13. Acids:
Answer Release H+ in water
14. Bases:
Answer form ions that bind with H+
15. Salts:
Answer Release ions other than h+ created when acids and bases combine
16. pH:
Answer amount of H+ present measure of acid/base in a solution
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