Lecture 3 Slides Flashcards
Matter
Anything that has mass and occupies space
Can be solid, liquid, or gas
Atom
Basic building block of matter composed of protons, neutrons, and electrons
Element
Composed of only one type of atom
Cannot be broken into simpler components
Molecule
Two or more same kind or different kinds of atoms chemically joined together
Compound
Two or more different kinds of atoms chemically joined together
Major elements of the body that is about 96% of body mass
O
C
H
N
Energy
Capacity to do work or put matter into motion
Types of energy
Kinetic and potential
Kinetic
Energy in motion
Potential
Stored energy in chem. bonds
Chemical reactions occur when
bonds are formed, rearranged, or broken
Synthesis
A+B → AB
Anabolic
Decomposition
AB →A+B
catabolic
Exchanged/rearanged
AB+C →AC+B
Exergonic
Release energy
Endergonic
Absorb energy
All chem reactions are
Reversible
Chemical equilibrium
When neither forward or reverse reaction
Many biological reactions are irreversible due to
Energy requirements
Removal of products
Rate of reaction is influenced by
High Temp (which increases rate)
Low particle size (which inseases rate)
High concentration of reactant which increases rate)
Catalysts
Increase rate without chem. Change
Enzymes are
Biological catalysts that regulate and promote all chem. Reactions in cells
Biochemistry
Study of chem. Comp. And reactions of living matter
Inorganic compounds
Water salts and many acids and bases
Do not contain carbon
