The Ultimate Human physiology Quiz
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The Ultimate Human physiology Quiz

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@AmicableRockCrystal6070

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Questions and Answers

What is the function of the cell membrane?

  • To engulf foreign bodies
  • To produce ATP
  • To support and protect the cell (correct)
  • To synthesize ribosomes

    • Which organelle is responsible for protein synthesis?

  • Lysosomes
  • Mitochondria
  • Golgi Bodies
  • Ribosomes (correct)

    • What is the function of the mitochondria?

  • To engulf foreign bodies
  • To synthesize ribosomes
  • To transport substances throughout the cell
  • To produce ATP (correct)

    • What is the function of the lysosomes?

    <p>To engulf foreign bodies and help in cell renewal</p> Signup and view all the answers

    What is the function of the nucleus?

    <p>To contain the hereditary material of the cell and send signals to the cells</p> Signup and view all the answers

    What is the function of the cell membrane?

    <p>It controls the movement of substances in and out of the cell</p> Signup and view all the answers

    What is the function of the nucleolus?

    <p>It is the site of ribosome synthesis</p> Signup and view all the answers

    What is the function of the lysosomes?

    <p>They protect the cell by engulfing foreign bodies</p> Signup and view all the answers

    What is the function of the Golgi bodies?

    <p>They are involved in the transportation of materials within the cell</p> Signup and view all the answers

    What is the function of the mitochondria?

    <p>They produce ATP for the cell</p> Signup and view all the answers

    What are enzymes?

    <p>Protein catalysts that speed up reactions by facilitating molecular rearrangements</p> Signup and view all the answers

    What is the difference between catabolic and anabolic pathways?

    <p>Catabolic pathways break down molecules and release energy, while anabolic pathways synthesize molecules and require energy input</p> Signup and view all the answers

    What is feedback inhibition?

    <p>Where the product of a metabolic pathway inhibits its own synthesis</p> Signup and view all the answers

    What is the purpose of balancing catabolic and anabolic pathways?

    <p>To control levels of critical metabolites and ensure sufficient energy</p> Signup and view all the answers

    How do enzymes increase reaction rates?

    <p>By changing shape when binding with substrate molecules</p> Signup and view all the answers

    What is the function of metabolic pathways?

    <p>To facilitate multiple steps where the product of one reaction becomes the substrate for the next</p> Signup and view all the answers

    What is the role of feedback inhibition in controlling metabolic pathways?

    <p>To control metabolic pathways by inhibiting their own synthesis</p> Signup and view all the answers

    Study Notes

    Cell Metabolism: Enzymes, Metabolic Pathways, and Chemical Reactions

    • Biochemical reactions within cells are necessary for daily operations.
    • Enzymes are protein catalysts that speed up reactions by facilitating molecular rearrangements.
    • Enzymes change shape when binding with substrate molecules, increasing reaction rates.
    • Enzymes can bring substrates into close proximity or act as an on/off switch.
    • Metabolic pathways involve multiple steps where the product of one reaction becomes the substrate for the next.
    • Enzymes involved in a metabolic pathway can be physically connected, allowing for efficient channeling of products.
    • Catabolic pathways break down complex organic molecules via the release of energy.
    • Anabolic pathways synthesize new macromolecules and require energy input.
    • Cells balance catabolic and anabolic pathways to control levels of critical metabolites and ensure sufficient energy.
    • Cells monitor the needs and surpluses of all metabolic pathways and can up- or down-regulate pathways accordingly.
    • Cells use feedback inhibition, where the product of a metabolic pathway inhibits its own synthesis, to control metabolic pathways.
    • Changes in concentrations of key metabolites in the cell can trigger up- or down-regulation of metabolic pathways.

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