Biology: Metabolism and Energy Sources
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Questions and Answers

What is the primary source of energy for the body?

  • Fiber
  • Lipids
  • Proteins
  • Carbohydrates (correct)

    • What is the function of lipids in the body?

  • To move foods along the GI tract
  • To fuel source during activity and manufacture EFA's (correct)
  • To convert glucose to ATP
  • To manufacture other proteins

    • What is the function of proteins in the body?

  • To manufacture other proteins and act as hormones and enzymes (correct)
  • To convert glucose to ATP
  • To move foods along the GI tract
  • To fuel source during activity

    • What is the daily recommended intake of fiber?

    <p>25-30 gm/day</p> Signup and view all the answers

    What is the process by which the liver supplies sugar or glucose?

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

    What is the function of the hepatic portal circulation?

    <p>To collect absorbed nutrients from the gastrointestinal tract and direct them to the liver for processing</p> Signup and view all the answers

    What is the basal metabolic rate (BMR)?

    <p>The body's rate of energy expenditure in basal conditions</p> Signup and view all the answers

    What is the response of the body when the external environment is cool/cold?

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

    Study Notes

    Carbohydrates

    • Classified as simple and complex
    • Function: convert glucose to ATP, preferred source of energy

    Lipids

    • Classified as saturated and unsaturated (EFA)
    • Functions: fuel source during activity, manufacture EFA's, transport fat-soluble vitamins, and cell functioning
    • Next preferred source of energy

    Proteins

    • Classified as structural, functional, growth, and repair
    • Function: manufacture other proteins, act as hormones, enzymes, and antibodies
    • Least preferred source of energy

    Fibre

    • Daily requirement: 25-30 gm/day (both insoluble and soluble)
    • Functions: move foods along the GI tract, reduce cholesterol, monitor BGL, and reduce risk of many cancers
    • Not classified

    Metabolism and the Liver

    Glucose Production

    • Liver supplies sugar or glucose through glycogenolysis (converting glycogen to glucose)

    Hepatic Portal Circulation

    • Ensures transfer of nutrients to the liver by collecting absorbed nutrients from the GI tract
    • Directs them to the liver for processing before entering general circulation

    Basal Metabolic Rate

    Definition

    • Basal metabolic rate (BMR): body's energy expenditure in basal conditions (awake, resting, postabsorptive, and warm environment)

    Metabolic Hormone

    • Insulin

    Thermoregulation

    • Body responds to cool/cold environment by shivering

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    Related Documents

    Metabolism and BMR.docx

    Description

    Learn about the classification and functions of carbohydrates and lipids as sources of energy in the human body.

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