UNIT 1 Flashcards
Levels of organization
atoms–molecules (DNA)–cells–Tissue–organs–organ system–Organism
Chemical bond
allow elements to combine and compounds to form.
SHAPE & FORM EFFECT:
FUNCTION
Similar chemical shapes
mimicking effect ex: Morphine, Heroin & Opiates mimic the effects of endorphins.
Synthesis
Combining atoms/molecules to form larger more complex molecules.
- ANABOLIC (energy taken in)
ex: DEHYDRATION SYNTHESIS
Decomposition
Breaking apart molecules (opposite of synthesis).
- CATABOLIC (energy released)
-ex: Hydrolysis
Exchange reaction
Bonds made/broken to exchange parts.
(Single/double/displacement)
EX: ATP forming phosphate and ADP
Factors influencing rate of reaction
increase in:
- TEMPERATURE
- PRESSURE
- Concentration
- Catalyst
- smaller particle size
Mixtures
Two or more compounds physically mixed and NOT chemically bonded
ex: blood
Solution
Homogeneous mixture
ex: urine
Major elements
(96%)
- Carbon
- hydrogen
- oxygen
- Nitrogen
Inorganic compound examples
Water, salts, many acids and bases
What are salts
- Dissolve in water
- contains cations other than (H+)
- Contains anions other than (OH-
- Electrolytes: conduct electrical currents in solution
pH
Neutral: 7
Blood: 7.4
Buffers
Chemical systems that resist abrupt/large swings in pH of body fluids
EX: Carbonic acid- Bicarbonate
-resists pH changes in the blood
Types of organic Compounds
Carbohydrates, Lipids, proteins and nucleic acids
Monomers and Polymers
Build Large chains of carbons called Macromolecules
Macro molecules
Cells build macromolecules by bonding small molecules (monomers) together to form long chains (polymers)
Carbohydrates
Carbon, Hydrogen, Oxygen
1:2:1
Functions of carbs
Major fuel source for cells, structural role
examples of carbs
- monosaccharides or simple sugars
- Disaccharides (double)
- Polysaccharides
Monosaccharides
- Sucrose
- Maltose
- Lactose
Sucrose
Glucose & Fructose
Maltose
Glucose & Glucose
Lactose
Galactose & Glucose