D515 Cell Physiology Questions with Verified
Correct Answers
Growth factors
-nutritional factors
-energy and carbon source
-environmental factors
Mammalian cell growth factors
-Macro and Micro
-essential nutrients that mammalian cells cant synthesize (9 essential amino acids, vitamins, 2
fatty acids (alpha-linolenic acid and linoleic acid)
Bacteria cell growth factors
-Macro and Micro
-most bacterial have pathways to synthesize essential nutrients (all amino acids, all lipids,
vitamins, unusual carbohydrates (NAM))
auxotrophs
incapable of de novo synthesis of one or more essential nutrients (many oral bacteria)
oral bacteria nutritional supplements
cross-feeding in polymicrobial biofilms
Catabolism
energy-yielding metabolism (breaks down)
Anabolism
, biosynthesis metabolism (building up)
Energy sources
-light
-chemical energy
Carbon sources
-CO2
-organic compound
Chemoheterotrophs
energy and carbon sources are both derived from (single) organic compounds (Mammalian
cells)
Environmental factors: Temperature
Mesophiles (oral bacteria)
-temperature in oral cavity is between 35-36 degrees celcius
-perodental pocket in active disease: up to 39 degrees celcius
Neutrophiles (oral bacteria)
pH (6.2-7.6)
Acidogenic
acid producing bacterial (lower environmental pH by metabolizing carbohydrates into
organic or inorganic acids)
Aciduric
capable of growth in an acidic environment
Correct Answers
Growth factors
-nutritional factors
-energy and carbon source
-environmental factors
Mammalian cell growth factors
-Macro and Micro
-essential nutrients that mammalian cells cant synthesize (9 essential amino acids, vitamins, 2
fatty acids (alpha-linolenic acid and linoleic acid)
Bacteria cell growth factors
-Macro and Micro
-most bacterial have pathways to synthesize essential nutrients (all amino acids, all lipids,
vitamins, unusual carbohydrates (NAM))
auxotrophs
incapable of de novo synthesis of one or more essential nutrients (many oral bacteria)
oral bacteria nutritional supplements
cross-feeding in polymicrobial biofilms
Catabolism
energy-yielding metabolism (breaks down)
Anabolism
, biosynthesis metabolism (building up)
Energy sources
-light
-chemical energy
Carbon sources
-CO2
-organic compound
Chemoheterotrophs
energy and carbon sources are both derived from (single) organic compounds (Mammalian
cells)
Environmental factors: Temperature
Mesophiles (oral bacteria)
-temperature in oral cavity is between 35-36 degrees celcius
-perodental pocket in active disease: up to 39 degrees celcius
Neutrophiles (oral bacteria)
pH (6.2-7.6)
Acidogenic
acid producing bacterial (lower environmental pH by metabolizing carbohydrates into
organic or inorganic acids)
Aciduric
capable of growth in an acidic environment
