Respiration practical

• What is the focus of the investigation mentioned?

  Rate of respiration in small organisms
• Why do we need to know how to investigate respiration?

  To understand the metabolic processes in organisms
• What tool can be used to measure the rate of respiration?

  A respirometer
• What type of respiration do organisms use in the experiment?

  Aerobic respiration
• How can the rate of respiration be calculated?

  By measuring oxygen consumed over time
• What is the experimental setup for measuring respiration rate?

  • Use woodlice in a test tube
  • Measure oxygen consumption with a respirometer
  • Control temperature to observe effects on respiration
• What is the purpose of adding soda lime in the experiment?

  To absorb carbon dioxide produced
• What happens to the volume of air in the test tube during respiration?

  It decreases as oxygen is consumed
• What effect does temperature have on the rate of respiration?

  Higher temperatures increase respiration rates
• What is the significance of the colored liquid in the respirometer?

  It indicates changes in air volume
• Why is it important to control variables in the respiration experiment?

  To ensure accurate and reliable results
• What are the key components of the respirometer setup?

  • Test tube containing woodlice
  • Soda lime to absorb CO₂
  • Colored liquid to measure volume changes
  • Temperature control mechanism
• What is the expected outcome of the experiment regarding respiration rates?

  Increased respiration at higher temperatures
• How does the experiment demonstrate the concept of respiration?

  By measuring oxygen consumption over time
• If you wanted to compare respiration rates of different organisms, what would you do?

  Use the same respirometer setup for each
• What factors can affect the rate of respiration in organisms?

  • Temperature
  • Oxygen availability
  • Carbon dioxide levels
  • Type of organism
• What is the role of woodlice in the respiration experiment?

  They serve as the test organisms
• What is the relationship between respiration and energy production?

  Respiration produces energy for cellular activities
• How does the experiment help in understanding ecological interactions?

  It shows how organisms utilize oxygen in ecosystems
• What gas is used in the tube during respiration?

  Oxygen
• How does CO₂ affect the experiment?

  It is absorbed by the soda lime
• What happens to the pressure in the tube when volume decreases?

  The pressure in the tube reduces
• What causes the liquid in the manometer to move?

  The decrease in pressure in the tube
• What is measured to calculate the volume of oxygen taken in?

  The distance moved by the liquid
• How can the rate of respiration be expressed?

  In cm³ min⁻¹
• What steps are repeated with different temperature baths?

  1. Set up the apparatus with woodlice.
  2. Measure the distance moved by the liquid.
  3. Record the time taken.
  4. Change the temperature of the water bath.
  5. Repeat the measurements.
• How does changing temperature affect respiration rate?

  It alters the rate of respiration
• What should be done to the woodlice during the experiment?

  They should be treated ethically
• Why is it important not to leave woodlice in the respirometer too long?

  They may run out of oxygen and die
• What is the consequence of not treating the woodlice ethically?

  They may die during the experiment
• What controls are important in respiration experiments?

  • Temperature consistency
  • Type of organism used
  • Volume of soda lime
  • Duration of the experiment
• What is the main focus of the experiment described?

  Measuring respiration rates
• What is the significance of the results obtained from the experiment?

  They indicate the respiration rate of organisms
• What is the relationship between respiration rate and temperature?

  Higher temperatures generally increase respiration rate
• What is the purpose of using a manometer in the experiment?

  To measure pressure changes
• Why is it important to keep conditions constant during the experiment?

  To ensure reliable and valid results
• How can the results of the experiment be used in real-world applications?

  To understand animal respiration in ecosystems
• What factors can affect the results of respiration experiments?

  • Temperature variations
  • Type of organism used
  • Duration of the experiment
  • Environmental conditions