Metabolism and Nutrition: Overview of Metabolic Reactions
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Questions and Answers

What percentage of the energy used during ATP production is converted into heat?

  • 10%
  • 90%
  • 30%
  • 60% (correct)

    • Which mode of heat transfer accounts for the largest percentage of heat loss in the human body?

  • Radiation (correct)
  • Conduction
  • Convection
  • Evaporation

    • What is the approximate percentage of energy expended for thermoregulation in the human body?

  • 10% (correct)
  • 20%
  • 5%
  • 15%

    • Which nutrient requires the most energy to break down in the body?

    <p>Proteins</p> Signup and view all the answers

    Which of the following is not a water-soluble vitamin?

    <p>Vitamin K</p> Signup and view all the answers

    What is the approximate caloric equivalent of 1 pound of fat?

    <p>3500 calories</p> Signup and view all the answers

    Which of the following is true about catabolic reactions?

    <p>They release energy by breaking down molecules</p> Signup and view all the answers

    What happens during glycolysis?

    <p>Glucose is converted to pyruvate, producing a net gain of 2 ATP molecules</p> Signup and view all the answers

    What is the primary function of the electron transport chain (ETC)?

    <p>To produce ATP through oxidative phosphorylation</p> Signup and view all the answers

    Which of the following is true about ketogenesis?

    <p>It produces ketone bodies as an alternative fuel source when glucose is low</p> Signup and view all the answers

    What is the primary function of the urea cycle?

    <p>To remove excess nitrogen from amino acid breakdown</p> Signup and view all the answers

    During the absorptive state, which of the following is true?

    <p>Glucose is being stored as glycogen</p> Signup and view all the answers

    What is the primary role of the Krebs cycle?

    <p>To generate high-energy electron carriers (NADH and FADH2) for the electron transport chain</p> Signup and view all the answers

    Which of the following is true about lipogenesis?

    <p>It is the process of synthesizing lipids from excess acetyl CoA when glucose is plentiful</p> Signup and view all the answers

    What is the primary role of gluconeogenesis?

    <p>To produce glucose from non-carbohydrate precursors like pyruvate and lactate</p> Signup and view all the answers

    Which of the following is true about the starvation state?

    <p>Ketone bodies become the primary energy source after several days</p> Signup and view all the answers

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