Gas Exchange in Animals
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Questions and Answers

Which gas is removed from our bodies through gas exchange during respiration?

  • Oxygen
  • Hydrogen
  • Nitrogen
  • Carbon dioxide (correct)

    • What is the purpose of setting up the boiling tube in Experiment 7.12?

  • To measure the gas exchange in mealworms
  • To provide a control group for comparison
  • To observe the color change of the hydrogencarbonate indicator (correct)
  • To create an artificial respiration system

    • What happens to the limewater in flask B and flask D when the vacuum pump is turned on in Checkpoint 7.6?

  • Limewater in flask B turns blue, limewater in flask D turns pink
  • Limewater in flask B turns pink, limewater in flask D turns blue
  • Limewater in flask B turns purple, limewater in flask D turns yellow (correct)
  • Limewater in flask B turns yellow, limewater in flask D turns purple

    • What is the main purpose of the human breathing system?

    <p>To provide oxygen to body cells</p> Signup and view all the answers

    What is the function of the bronchioles in the breathing system?

    <p>To exchange gases at the air sacs</p> Signup and view all the answers

    What is the texture of the pig's lungs?

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

    How does the volume of the lungs change when air is pumped into them?

    <p>The volume increases</p> Signup and view all the answers

    Which one of these is true about gas exchange in plants?

    <p>Gas exchange in plants is carried out through the stomata on the leaf epidermis.</p> Signup and view all the answers

    What is the role of stomata in gas exchange in plants?

    <p>Stomata help in the uptake of carbon dioxide.</p> Signup and view all the answers

    During photosynthesis, what happens to the rate of respiration in plants?

    <p>The rate of respiration decreases.</p> Signup and view all the answers

    What is the net gas exchange in plants during the daytime?

    <p>Net uptake of carbon dioxide and net release of oxygen.</p> Signup and view all the answers

    What happens to gas exchange in plants at night?

    <p>There is a net uptake of carbon dioxide and a net release of oxygen.</p> Signup and view all the answers

    What is the purpose of using hydrogencarbonate indicator in Experiment 7.7?

    <p>To show any change in carbon dioxide content.</p> Signup and view all the answers

    What does the hydrogencarbonate indicator show in Experiment 7.7?

    <p>Different colours in different carbon dioxide contents.</p> Signup and view all the answers

    Which of the following statements about stomata is true?

    <p>Stomata control the opening and closing of guard cells.</p> Signup and view all the answers

    What is the function of guard cells?

    <p>To control the opening and closing of stomata.</p> Signup and view all the answers

    What happens to stomata at night?

    <p>They shrink as they lose water.</p> Signup and view all the answers

    What is the main function of stomata?

    <p>To absorb carbon dioxide for photosynthesis.</p> Signup and view all the answers

    What is the purpose of observing stomata under a microscope?

    <p>To observe gas exchange in plants.</p> Signup and view all the answers

    What is the color of the cobalt chloride paper after breathing onto the mirror?

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

    What can be concluded about the water vapor content of inhaled air compared to exhaled air?

    <p>Inhaled air contains less water vapor than exhaled air.</p> Signup and view all the answers

    Which of the following correctly describes the process of gas exchange in humans?

    <p>Oxygen passes from the air sacs into the blood</p> Signup and view all the answers

    What is the purpose of gas exchange in the lungs?

    <p>To supply oxygen to body cells and remove carbon dioxide from the body</p> Signup and view all the answers

    Where does gas exchange take place in humans?

    <p>At the air sacs inside the lungs</p> Signup and view all the answers

    What is the total surface area of the air sacs in our lungs?

    <p>The size of a tennis court</p> Signup and view all the answers

    In which lungs do you think gas exchange is more effective, frog or human?

    <p>Human lungs</p> Signup and view all the answers

    What happens to carbon dioxide during respiration?

    <p>It passes from the air sacs into the blood</p> Signup and view all the answers

    What happens to oxygen during respiration?

    <p>It is carried by blood flowing to the lungs</p> Signup and view all the answers

    What is the main purpose of pumping air into the lungs?

    <p>To increase lung volume</p> Signup and view all the answers

    What is the effect of smoking on gas exchange in humans?

    <p>It decreases gas exchange</p> Signup and view all the answers

    Which of the following is a function of the human breathing system?

    <p>Gas exchange</p> Signup and view all the answers

    What is the purpose of setting up the boiling tube in Experiment 7.12?

    <p>To observe gas exchange in mealworms</p> Signup and view all the answers

    What happens to the limewater in flask B and flask D when the vacuum pump is turned on in Checkpoint 7.6?

    <p>Limewater in flask B turns cloudy, limewater in flask D remains clear</p> Signup and view all the answers

    What is the main purpose of gas exchange in the lungs?

    <p>To obtain oxygen and remove carbon dioxide</p> Signup and view all the answers

    What is the texture of the pig's lungs?

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

    Which gas is removed from our bodies through gas exchange during respiration?

    <p>Carbon dioxide</p> Signup and view all the answers

    How does the volume of the lungs change when air is pumped into them?

    <p>The volume increases</p> Signup and view all the answers

    Which of the following correctly describes gas exchange in plants?

    <p>Plants release oxygen and uptake carbon dioxide during photosynthesis</p> Signup and view all the answers

    What is the purpose of using hydrogencarbonate indicator in Experiment 7.7?

    <p>To show any change in carbon dioxide content</p> Signup and view all the answers

    What is the main function of stomata in plants?

    <p>To exchange gases with the environment</p> Signup and view all the answers

    What happens to gas exchange in plants at night?

    <p>Gas exchange stops completely</p> Signup and view all the answers

    Which of the following statements about gas exchange in humans is true?

    <p>Carbon dioxide is released and oxygen is taken in during inhalation</p> Signup and view all the answers

    What is the main purpose of the human breathing system?

    <p>To supply the body with oxygen and remove carbon dioxide</p> Signup and view all the answers

    What is the role of stomata in gas exchange in plants?

    <p>To exchange gases with the environment</p> Signup and view all the answers

    Which of the following best describes the function of stomata in plants?

    <p>To exchange gases with the atmosphere</p> Signup and view all the answers

    What happens to stomata at night?

    <p>They shrink as they lose water</p> Signup and view all the answers

    What is the purpose of observing stomata under a microscope?

    <p>To measure the size of stomata</p> Signup and view all the answers

    What is the main purpose of the human breathing system?

    <p>To take in oxygen and release carbon dioxide</p> Signup and view all the answers

    What is the effect of smoking on gas exchange in humans?

    <p>It damages the alveoli, reducing gas exchange</p> Signup and view all the answers

    What is the net gas exchange in plants during the daytime?

    <p>They take in more carbon dioxide than they release</p> Signup and view all the answers

    What happens to the limewater in flask B and flask D when the vacuum pump is turned on in Checkpoint 7.6?

    <p>The limewater in flask B turns cloudy, but the limewater in flask D remains clear</p> Signup and view all the answers

    Which of the following is true about gas exchange in humans?

    <p>Gas exchange takes place between the air sacs and the surrounding capillaries.</p> Signup and view all the answers

    What is the total surface area of the air sacs in our lungs?

    <p>Approximately the size of a tennis court.</p> Signup and view all the answers

    What is the main function of stomata in plants?

    <p>To allow for gas exchange.</p> Signup and view all the answers

    What is the effect of smoking on gas exchange in humans?

    <p>It decreases the efficiency of gas exchange.</p> Signup and view all the answers

    Where does gas exchange take place in humans?

    <p>In the alveoli.</p> Signup and view all the answers

    What does gas exchange in humans allow for?

    <p>Continuous supply of oxygen to the body cells.</p> Signup and view all the answers

    What is the purpose of observing lung tissue in water?

    <p>To determine if it floats or sinks.</p> Signup and view all the answers

    Which of the following correctly describes the process of gas exchange in humans?

    <p>Oxygen passes from the air sacs into the blood, while carbon dioxide passes from the blood into the air sacs.</p> Signup and view all the answers

    What is the structure responsible for gas exchange in humans?

    <p>Alveoli.</p> Signup and view all the answers

    Study Notes

    Respiration and Gas Exchange

    • Carbon dioxide is removed from our bodies through gas exchange during respiration.
    • The main purpose of the human breathing system is to take in oxygen and expel carbon dioxide.

    Experiment 7.12

    • The boiling tube is set up to collect and measure the volume of carbon dioxide produced during respiration.

    Gas Exchange in Plants

    • Gas exchange in plants occurs through stomata, which are small openings on the surface of leaves.
    • The main function of stomata is to regulate gas exchange by opening and closing.
    • During the daytime, the net gas exchange in plants is a net gain of oxygen and release of carbon dioxide.
    • At night, gas exchange is reversed, and plants release oxygen and absorb carbon dioxide.

    Stomata

    • Guard cells surround stomata and control their opening and closing.
    • Stomata observe a daily rhythm, opening during the day and closing at night.
    • The main purpose of observing stomata under a microscope is to understand their structure and function.

    Lung Structure and Function

    • The bronchioles are responsible for directing air into the air sacs where gas exchange takes place.
    • The texture of the pig's lungs is spongy and highly vascularized.
    • When air is pumped into the lungs, their volume increases.

    Gas Exchange in Humans

    • Gas exchange takes place in the alveoli, tiny air sacs within the lungs.
    • The total surface area of the air sacs in our lungs is approximately 70 square meters.
    • Gas exchange in humans allows for the exchange of oxygen and carbon dioxide between the lungs and bloodstream.
    • The structure responsible for gas exchange in humans is the alveoli.

    Effects of Smoking

    • Smoking has a negative effect on gas exchange in humans, reducing lung function and efficiency.

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    Related Documents

    Gas Exchange in Plants and Animals PDF

    Description

    Discovering Gas Exchange in Animals: Join us in Experiment 7.12 as we explore how artificial respiration can save lives by studying the gas exchange process in different animals. Watch the informative video ev07s12 to learn more!

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