BIOS 1300 Lab Exam #1 (labs 1-4) Quizzes & Ans..
what is another name for coronal plane?
frontal
medial
toward the midline
distal
further from the trunk
interior
downward
posterior
toward the back
superficial
toward the surface of the skin
lateral
away from the midline
superior
upward
anterior
toward the front
proximal
closer to the trunk
deep
away from the surface
what is the smallest particle of an element that retains the properties of an
element?
atom
what comprises the central nucleus?
protons and neutrons
what is an electron shell?
concentric regions that electrons are constantly moving around in that surrounds the
nucleus
what is the charge of an electron, proton and neutron?
electrons have a negative charge, protons have a positive charge and neutrons are
neutral, so they have no charge.
what is an atomic number?
the number of protons in an atom
what is an atomic mass?
the sum of an atom's protons and neutrons
what are isotopes?
atoms that have the same atomic number but different atomic weights
how many electrons are held in the second valence shell?
8 electrons
what determines the chemical bonding properties of an atom?
the electrons in the valence shell
which type of element is the most stable and chemically inactive?
, helium
whats determines the number and the kind of bonds an atom forms?
the number of electrons needed to fill the valence shell
why do atoms gain, share, or lose electrons?
to achieve a stable number of valence electrons
which type of bonding shares electrons?
covalent
which type of bonding donates electrons?
ionic
why do atoms want to achieve an octet of electrons?
what are two properties of nonpolar covalent bonds?
what is electronegativity?
a measure of the tendency of an atom to attract a bonding pair of electrons.
what is the difference between polar and nonpolar covalent bonds?
nonpolar bonds have the same electronegativity therefore have a equal sharing of the
bonding electron pair. a polar bond have different electronegativities so therefore have
an unequal sharing of the bonding electron pair.
electrolyte
a substance that, when dissolved in water, results in a solution that can conduct
electricity
what makes sodium chloride a strong electrolyte?
its a soluble salt that is assumed to completely dissolve in water. contains large amount
of ions.
define dissociate
what is an example of a weak acid? what makes it a weak electrolyte?
Carbonic Acid. it only partially ionizes in water
what is the formula for carbonic acid?
H2CO3
what is the formula for bicarbonate?
HCO3-
name all monosaccharides
glucose, galactose, fructose
name all disaccharides
sucrose, lactose, maltose
name all polysaccharides
cellulose, starch, glycogen
name all enzymes
lactase, sucrase, maltase
how many amino acids are there? how many are essential? non essential?
20 amino acids
9 essential, 11 non essential
what basic elements are found in all carbohydrates?
carbon and hydrogen
what molecule or elements are missing from maltose vs two independent glucose
molecules?
hydrogen
what is another name for coronal plane?
frontal
medial
toward the midline
distal
further from the trunk
interior
downward
posterior
toward the back
superficial
toward the surface of the skin
lateral
away from the midline
superior
upward
anterior
toward the front
proximal
closer to the trunk
deep
away from the surface
what is the smallest particle of an element that retains the properties of an
element?
atom
what comprises the central nucleus?
protons and neutrons
what is an electron shell?
concentric regions that electrons are constantly moving around in that surrounds the
nucleus
what is the charge of an electron, proton and neutron?
electrons have a negative charge, protons have a positive charge and neutrons are
neutral, so they have no charge.
what is an atomic number?
the number of protons in an atom
what is an atomic mass?
the sum of an atom's protons and neutrons
what are isotopes?
atoms that have the same atomic number but different atomic weights
how many electrons are held in the second valence shell?
8 electrons
what determines the chemical bonding properties of an atom?
the electrons in the valence shell
which type of element is the most stable and chemically inactive?
, helium
whats determines the number and the kind of bonds an atom forms?
the number of electrons needed to fill the valence shell
why do atoms gain, share, or lose electrons?
to achieve a stable number of valence electrons
which type of bonding shares electrons?
covalent
which type of bonding donates electrons?
ionic
why do atoms want to achieve an octet of electrons?
what are two properties of nonpolar covalent bonds?
what is electronegativity?
a measure of the tendency of an atom to attract a bonding pair of electrons.
what is the difference between polar and nonpolar covalent bonds?
nonpolar bonds have the same electronegativity therefore have a equal sharing of the
bonding electron pair. a polar bond have different electronegativities so therefore have
an unequal sharing of the bonding electron pair.
electrolyte
a substance that, when dissolved in water, results in a solution that can conduct
electricity
what makes sodium chloride a strong electrolyte?
its a soluble salt that is assumed to completely dissolve in water. contains large amount
of ions.
define dissociate
what is an example of a weak acid? what makes it a weak electrolyte?
Carbonic Acid. it only partially ionizes in water
what is the formula for carbonic acid?
H2CO3
what is the formula for bicarbonate?
HCO3-
name all monosaccharides
glucose, galactose, fructose
name all disaccharides
sucrose, lactose, maltose
name all polysaccharides
cellulose, starch, glycogen
name all enzymes
lactase, sucrase, maltase
how many amino acids are there? how many are essential? non essential?
20 amino acids
9 essential, 11 non essential
what basic elements are found in all carbohydrates?
carbon and hydrogen
what molecule or elements are missing from maltose vs two independent glucose
molecules?
hydrogen
