10th Class Science: Respiratory System and Running
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Questions and Answers

Why does running make a person breathe faster?

  • To get more oxygen from the air (correct)
  • To improve the functioning of cells
  • To expel carbon dioxide from the body
  • To release stored energy
  • What is the main purpose of respiration?

  • To release stored energy (correct)
  • To transport nutrients within the body
  • To improve the functioning of cells
  • To excrete waste from the body
  • Why do living organisms respire?

  • To get rid of excess carbon dioxide
  • To release stored energy from food (correct)
  • To regulate body temperature
  • To obtain oxygen from the air
  • What do cells need energy for?

    <p>To perform cellular functions</p> Signup and view all the answers

    Why do we need to eat regularly?

    <p>To release stored energy from food</p> Signup and view all the answers

    What is the main component of air that we breathe in?

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

    What is the process of breakdown of food in the cell with the release of energy called?

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

    When breakdown of glucose occurs with the use of oxygen, it is called:

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

    Which organisms can survive in the absence of air and get energy through anaerobic respiration?

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

    What do muscle cells produce when they respire anaerobically due to a temporary deficiency of oxygen?

    <p>Lactic acid</p> Signup and view all the answers

    Why do muscle cramps occur after heavy exercise when muscle cells respire anaerobically?

    <p>Accumulation of lactic acid</p> Signup and view all the answers

    What happens after a hot water bath or massage that relieves muscle cramps caused by anaerobic respiration?

    <p>Increase in oxygen supply to muscle cells</p> Signup and view all the answers

    Which process involves breaking down glucose into alcohol, carbon dioxide, and energy without using oxygen?

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

    Why are yeast used in making wine and beer?

    <p>To respire anaerobically and yield alcohol</p> Signup and view all the answers

    What causes muscle cramps after heavy exercise when muscle cells respire anaerobically?

    <p>Increased production of lactic acid</p> Signup and view all the answers

    What do yeast produce during anaerobic respiration?

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

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