Epithelial tissue - covers body surfae and lines cavities. Functions primarily as protection,
secretion, absorption, excretion, filtration. All cells are exposed to the environment on one side and
attached to a basement membrane on other.
Proteins - monomeric unit is amino acid (peptide, polypep...
Biology 106 Exam 1
Epithelial tissue - covers body surfae and lines cavities. Functions primarily as protection,
secretion, absorption, excretion, filtration. All cells are exposed to the environment on one side and
attached to a basement membrane on other.
Proteins - monomeric unit is amino acid (peptide, polypeptide, protein). Functions- enzymes,
antibodies, support, keratin, transport molecules, motion, hormones. Peptide bond.
metabolism - all the chemical reactions that occur in cell. all biological must follow the laws of
chemistry and physics. Most reactions require energy in the form of ATP.
matter - anything that takes up space and has mass
element - basic building block of matter
atom - smallest unit of an element composed of protons
molecule - atoms of same type bonded together
compound - different atoms bonded together all compounds and molecules, not all molecules are
compounds.
chemical bond - attraction between atoms that enables the formation of molecules.
covalent bond - a principal force that holds atoms together, electrons are shared. may be single,
double, triple.
ionic bond - attraction between oppositely charged atom. donating or accepting electrons.
, hydrogen bond - weak covalent bond, usually between H+ and O2 or N2. responsible for
properties of H20.
water - universal solvent, substances dissolve into it.
solute - dissolved substance
solution - solvent and solute
hydrophilic - molecule that attract H20
hydrophobic - cannot attract H20
polar - slightly changed yet neutral molecules, dissolve in H20
nonpolar - electrically neutral, don't dissolve in H20
adhesion - H20 to surface
cohesion - H20 to H20
acid/base - molecule that donates H+ in H20/OH+
pH scale - measures amount of hydrogen ions. 7 is neutral, above 7 base, below 7 acid. Pure water
is neutral.
buffer - substance that tend to resist changes in pH and help maintain physiological pH. human
blood is 7.4
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