PNB 2265: Metabolism- Questions and Answers |
2026 UPDATED | 100% CORRECT
metabolism
balance between energy input & energy expenditure
nutrients absorbed in metabolism
carbohydrates, lipids, & proteins
goal of metabolism
maintaining energy homeostasis
basal metabolic rate
energy required for basic life functions at rest
example of BMR
-sodium potassium pump as it maintains resting membrane potential & constantly uses ATP
byproduct of metabolism
heat
function of heat
maintains thermal homeostasis (body temperature)
energy input
the body absorbs energy from carbohydrates, proteins, & fats
where does energy expenditure com from?
,-metabolic rate at 30 - 60%
-physical activity at 10 - 60%
-thermoregulation at 10%
normal skeletal muscle energy usage
moderate energy consumption
exception to skeletal muscle energy use
very high during intense exercise
anabolic pathways
build & store macromolecules
examples of anabolic pathways
-protein synthesis
-glycogen formation
-requires energy (ATP)
catabolic pathways
break down macromolecules
purpose of catabolic pathways
, release energy
examples of catabolic pathways
breakdown of carbs, fats, & proteins
control of metabolism
metabolism is involuntary
components of metabolism not directly controlled
ATP production & ATP consumption
control of energy expenditure
-activity level
-more activity = higher energy expenditure
control of energy intake
we have control over energy consumption, which is determined by what & how much we eat
hunger
desire to eat
satiety
no desire to eat (feeling full)
what are hunger & satiety controlled by?
gut-brain axis
2026 UPDATED | 100% CORRECT
metabolism
balance between energy input & energy expenditure
nutrients absorbed in metabolism
carbohydrates, lipids, & proteins
goal of metabolism
maintaining energy homeostasis
basal metabolic rate
energy required for basic life functions at rest
example of BMR
-sodium potassium pump as it maintains resting membrane potential & constantly uses ATP
byproduct of metabolism
heat
function of heat
maintains thermal homeostasis (body temperature)
energy input
the body absorbs energy from carbohydrates, proteins, & fats
where does energy expenditure com from?
,-metabolic rate at 30 - 60%
-physical activity at 10 - 60%
-thermoregulation at 10%
normal skeletal muscle energy usage
moderate energy consumption
exception to skeletal muscle energy use
very high during intense exercise
anabolic pathways
build & store macromolecules
examples of anabolic pathways
-protein synthesis
-glycogen formation
-requires energy (ATP)
catabolic pathways
break down macromolecules
purpose of catabolic pathways
, release energy
examples of catabolic pathways
breakdown of carbs, fats, & proteins
control of metabolism
metabolism is involuntary
components of metabolism not directly controlled
ATP production & ATP consumption
control of energy expenditure
-activity level
-more activity = higher energy expenditure
control of energy intake
we have control over energy consumption, which is determined by what & how much we eat
hunger
desire to eat
satiety
no desire to eat (feeling full)
what are hunger & satiety controlled by?
gut-brain axis
