Metabolism and Catabolism Quiz
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Metabolism and Catabolism Quiz

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Questions and Answers

What is the main purpose of the urea cycle?

  • To synthesize cholesterol and bile salts
  • To remove excess nitrogen from the body (correct)
  • To convert glucose into glycogen
  • To regulate body temperature

    • Which of the following is NOT a major mechanism of heat loss from the body?

  • Condensation (correct)
  • Radiation
  • Conduction
  • Convection

    • What is the primary function of ketone bodies in the absence of glucose?

  • To provide energy for the brain (correct)
  • To stimulate protein synthesis
  • To increase insulin production
  • To promote glycogen synthesis

    • What is the main difference between the absorptive and postabsorptive states?

    <p>The absorptive state is characterized by high insulin levels, while the postabsorptive state is characterized by low insulin levels.</p> Signup and view all the answers

    Which macronutrient requires the most energy to break down?

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

    What is the primary function of catabolism?

    <p>Breaking down large molecules into smaller ones</p> Signup and view all the answers

    Which of the following is NOT a catabolic hormone?

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

    What is the primary function of lipogenesis?

    <p>To convert excess acetyl CoA into storage forms of energy</p> Signup and view all the answers

    What is the main purpose of the hypothalamus in thermoregulation?

    <p>Both a and b</p> Signup and view all the answers

    What percentage of energy released from catabolism is transferred to ATP?

    <p>40%</p> Signup and view all the answers

    Which type of heat loss accounts for the largest percentage of total heat loss from the body?

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

    What is the primary source of energy for cells when we need more energy than what we eat?

    <p>Stored glycogen or fat</p> Signup and view all the answers

    What is the relationship between calorie intake, calorie expenditure, and weight gain/loss?

    <p>Eating 10% more calories than used each day leads to overweight, while eating 20% more leads to obesity.</p> Signup and view all the answers

    What is the primary function of anabolism?

    <p>Using energy from catabolic reactions to build small molecules into large molecules</p> Signup and view all the answers

    What is the main function of vitamins in the body?

    <p>To facilitate biochemical reactions</p> Signup and view all the answers

    What is the primary storage form of carbohydrates in the body?

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

    What is the final electron receptor in aerobic respiration?

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

    Which hormone is responsible for cells taking up glucose from the circulatory system?

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

    What is the primary function of glycolysis?

    <p>Production of ATP</p> Signup and view all the answers

    What process converts pyruvate to lactic acid in the absence of oxygen?

    <p>Anaerobic respiration</p> Signup and view all the answers

    Which enzyme converts pyruvate into acetyl CoA in the mitochondria?

    <p>Pyruvate dehydrogenase</p> Signup and view all the answers

    During lipid metabolism, what stimulates the release of pancreatic lipase and bile salts?

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

    What is the primary function of the Krebs cycle in cellular respiration?

    <p>Generate ATP molecules</p> Signup and view all the answers

    Which molecule yields more energy compared to carbohydrates and proteins?

    <p>Fatty acids</p> Signup and view all the answers

    What is the primary outcome of ketogenesis?

    <p>Creation of ketone bodies</p> Signup and view all the answers

    What is the main purpose of the Cori cycle?

    <p>Convert lactic acid to glucose in muscle cells</p> Signup and view all the answers

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