A&P CHAPTER 2: CHEMICAL BASICS OF LIFE Flashcards
CHEMISTRY
SCIENCE THAT DEALS WITH THE STRUCTURE OF MATTER
MATTER
DESCRIBES ALL THINGS OCCUPYING SPACE AND HAVING MASS
PROTONS
POSITIVE CHARGE
NEUTRONS
NEUTRAL (UNCHARGED)
ELECTRONS
NEGATIVE CHARGE
HOW IS ATOM’S MASS DETERMINED
NUMBER OF PROTONS AND NEUTRONS IN ITS NUCLEUS
ATOMIC NUMBER
NUMBER OF PROTONS IN AN ATOM
ISOTOPE
ELEMENT’S ATOMS HAVE SAME NUMBER OF PROTONS BUT DIFFERENT NUMBER OF NEUTRONS
ATOM
TINY PARTICLES THAT COMPOSE ELEMENTS
MOLECULE
CHEMICAL STRUCTURE OF ATOMS HELD TOGETHER BY COVALENT BONDS
MIXTURES
SUBSTANCES CONTAINING TWO OR MORE COMPONENTS
COLLOIDS
AKA EMULSIONS
HETEROGENEOUS MIXTURES
LARGE SOLUTE PARTICLES THAT DO NOT SETTLE
SOLUTIONS
HOMOGENEOUS MIXTURES
SOLVENT
LARGEST SUBSTANCE PRESENT IN MIXTURE
DISSOLVING MEDIUM
SOLUTES
SMALLER SUBSTANCE PRESENT IN MIXTURE
SUSPENSIONS
HETEROGENEOUS MIXTURES
LARGE SOLUTES THAT SETTLE
COMPOUND
TWO IDENTICAL MOLECULES
IONS
ATOMS THAT EITHER GAIN OR LOSE ELECTRONS
IONIC BOND
BOND DUE TO TRANSFER OF ELECTRONS
CATIONS
POSITIVE IONS
ANIONS
NEGATIVE IONS
COVALENT BOND
BOND DUE TO SHARING OF ELECTRONS
NONPOLAR MOLECULES
ELECTRICALLY BALANCED
POLAR MOLECULES
UNEQUAL ELECTRON PAIR SHARING
DIPOLE
MOLECULE WITH TWO POLES OF CHARGE
HYDROGEN BOND
BOND WHEN POSITIVE HYDROGEN END OF POLAR MOLECULE IS ATTRACTED TO NEGATIVE NITROGEN OR OXYGEN END OF ANOTHER POLAR MOLECULE
WEAK BONDS
EXAMPLES: PROTEINS AND DNA
CHEMICAL REACTION
OCCURS WHEN CHEMICAL BOND IS FORMED, BROKEN, OR REARRANGED
REACTANTS
REACTING SUBSTANCES IN CHEMICAL REACTION
PRODUCTS
CHEMICAL COMPOSITION OF THE RESULTS OF CHEMICAL REACTION
SYNTHESIS REACTIONS
TWO OR MORE REACTANTS BOND TO FORM MORE COMPLEX PRODUCT OR STRUCTURE
EXAMPLE: GROWTH AND REPAIR OF TISSUES
DECOMPOSITION REACTIONS
BONDS WITHIN REACTANT MOLECULE BREAK AND FORM SOMETHING SIMPLER
EXAMPLE: DIGESTION
EXCHANGE REACTIONS
REACTING MOLECULES ARE MOVED AROUND TO PRODUCE NEW PRODUCTS
REVERSIBLE REACTIONS
PRODUCTS OF THE REACTION CAN CHANGE BACK INTO THE REACTANTS THEY ORIGINALLY WERE
ACIDS
ELECTROLYTES THAT RELEASE HYDROGEN IONS IN WATER LESS THAN 7 PH
BASES
ELECTROLYTES THAT RELEASE HYDROXIDE
GREATER THAN 7 PH
NEUTRAL PH
7
EQUAL HYDROGEN AND HYDROXIDE IONS
ACIDOSIS AND TWO TYPES
BLOOD PH LESS THAN 7.35
METABOLIC: KIDNEYS CANT REMOVE KETONES
RESPIRATORY: TOO MUCH CARBON DIOXIDE IN BLOOD
ALKALOSIS AND TWO TYPES
BLOOD PH MORE THAN 7.45
METABOLIC: DECREASED HYDROGEN ION CONCENTRATION
RESPIRATORY: INCREASED RESPIRATIONS
BUFFERS
CHEMICALS THAT RESIST PH CHANGES
EXAMPLE: SODIUM BICARBONATE
5 PROPERTIES OF WATER
CUSHIONING (PROTECTION OF ORGANS AGAINST TRAUMA)
HIGH HEAT CAPACTIY (ABSORBS/RELEASE HEAT BEFORE WATER ITSELF CHANGES TEMP)
HIGH VAPORIZATION HEAT (CHANGING FROM LIQUID TO GAS DURING SWEATING)
POLAR SOLVENT PROPERTIES (UNIVERSAL SOLVENT FOR REACTIONS IN BODY)
REACTIVITY (IMPORTANT REACTANT IN MANY CHEMICAL REACTIONS)
SALTS
COMPOUNDS OF OPPOSITELY CHARGED IONS THAT ARE ABUNDANT IN TISSUE FLUIDS
IONIC COMPOUND
SALT’S FUNCTION IN BODY
HARDEN BONES
TRANSPORT SUBSTANCES TO AND FROM CELLS
MUSCLE CONTRACTIONS
NERVE IMPULSE CONDUCTION
ORGANIC CHEMICALS
CONTAIN THE ELEMENTS CARBON, HYDROGEN AND USUALLY OXYGEN
INORGANIC CHEMICALS
AKA ELECTROLYTES
DO NOT CONTAIN ANY ELEMENTS
CARBOHYDRATES
PROVIDE MUCH OF THE ENERGY REQUIRED BY BODY’S CELLS
LIPIDS
INSOLUBLE IN WATER
PROVIDE TWICE THE ENERGY OF CARBS
HELP MAINTAIN BODY TEMP
PROTEINS
MUST ABUNDANT ORGANIC COMPONENTS OF BODY
BASIC STRUCTURAL MATERIALS OF BODY
NUCLEIC ACIDS
LARGE ORGANIC MOLECULES THAT CARRY GENETIC INFO OR FORM STRUCTURES WITHIN CELLS
DNA
ENCODE INFO NEEDED TO BUILD PROTEINS
CONTROLS BODY CHARACTERISTICS
RNA
COOOPERATE TO MANUFACTURE PROTEINS USING INFO FROM DNA
3 TYPES OF RNA
MESSENGER
TRANSFER
RIBOSOMAL
MAJOR ELEMENTS IN BODY
OXYGEN
CARBON
HYDROGEN
NITROGEN
CALCIUM
IMPORTANT BUFFER IN BODY FLUIDS
SODIUM BICARBONATE
WHAT COMPOSES NUCLEIC ACIDS
NUCLEOTIDES
MOST IMPORTANT HIGH ENERGY COMPOUND IN CELLS
GLUCOSE