FNDH 620 Exam 2 Questions and Answers |Complete Solutions Graded A+ |100% Correct
What does high Km say about the amount of substrate needed for the reaction to occur?
means a lot of substrate must be present to saturate the enzyme, meaning the enzyme has
low affinity for the substrate.
What does Low Km say about the amount of substrate needed for the reaction to occur?
indicates that the enzyme requires only a small amount of substrate to become saturated.
Hence, the maximum velocity is reached at relatively low substrate concentrations.
Common limiting amino acids lysine, threonine, methionine, and tryptophan
Health concerns associated excess dietary protein •Increased renal stress
•Bone demineralization
•Increased incidence of colon cancer
•Obesity
Kwashiorkor protein deficiency
Marasmus A wasting away of body tissues in the infant's first year, caused by severe
protein-calorie deficiency.
Methods of measuring energy expenditure -measuring heat loss from the body
-measuring oxygen use
Direct vs indirect calorimetry Direct calorimetry—metabolic rate is measured directly by
measuring the amount of heat produced with a human calorimeter
Indirect Calorimetry: ATP is generated from the combustion of energy molecules, Indirect
calorimetry is assessed with a metabolic cart
, RQ Respiratory Quotient
RQ of glucose 1
RQ of fat 0.7
Four subcategories that make up total energy expenditure 1.Basal metabolism (BM)
2.Thermic effect of activity (TEA)
3.Thermic effect of food (TEF)
4.Adaptive thermogenesis (AT)
Basal metabolic rate vs. resting metabolic rate Basal metabolism (BMR): energy expended
by internal processes
Resting metabolism (RMR): a nonfasting state
Thermic effect of activity skeletal muscle activity during activity and maintaining posture
NEAT nonexercise activity thermogenesis I.e activities associated with daily living
thermic effect of food The increase in metabolism attributable to the digestion, absorption,
processing, and storage of food and its components
adaptive thermogenesis the energy used by the body to adjust to changing physical and
biologic environmental situations.
methods of dissipating heat If skin temperature is greater than that of the surroundings, the
body can lose heat by radiation and conduction.
What does high Km say about the amount of substrate needed for the reaction to occur?
means a lot of substrate must be present to saturate the enzyme, meaning the enzyme has
low affinity for the substrate.
What does Low Km say about the amount of substrate needed for the reaction to occur?
indicates that the enzyme requires only a small amount of substrate to become saturated.
Hence, the maximum velocity is reached at relatively low substrate concentrations.
Common limiting amino acids lysine, threonine, methionine, and tryptophan
Health concerns associated excess dietary protein •Increased renal stress
•Bone demineralization
•Increased incidence of colon cancer
•Obesity
Kwashiorkor protein deficiency
Marasmus A wasting away of body tissues in the infant's first year, caused by severe
protein-calorie deficiency.
Methods of measuring energy expenditure -measuring heat loss from the body
-measuring oxygen use
Direct vs indirect calorimetry Direct calorimetry—metabolic rate is measured directly by
measuring the amount of heat produced with a human calorimeter
Indirect Calorimetry: ATP is generated from the combustion of energy molecules, Indirect
calorimetry is assessed with a metabolic cart
, RQ Respiratory Quotient
RQ of glucose 1
RQ of fat 0.7
Four subcategories that make up total energy expenditure 1.Basal metabolism (BM)
2.Thermic effect of activity (TEA)
3.Thermic effect of food (TEF)
4.Adaptive thermogenesis (AT)
Basal metabolic rate vs. resting metabolic rate Basal metabolism (BMR): energy expended
by internal processes
Resting metabolism (RMR): a nonfasting state
Thermic effect of activity skeletal muscle activity during activity and maintaining posture
NEAT nonexercise activity thermogenesis I.e activities associated with daily living
thermic effect of food The increase in metabolism attributable to the digestion, absorption,
processing, and storage of food and its components
adaptive thermogenesis the energy used by the body to adjust to changing physical and
biologic environmental situations.
methods of dissipating heat If skin temperature is greater than that of the surroundings, the
body can lose heat by radiation and conduction.
