Biology Quiz on Mealworm Respiration
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Questions and Answers

What gas do mealworms take in for respiration?

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

    • What is released by mealworms during respiration?

  • Nitrogen
  • Carbon dioxide (correct)
  • Methane
  • Ozone

    • How does the decrease in oxygen inside the tube affect gas pressure?

  • The pressure fluctuates randomly
  • The pressure decreases (correct)
  • The pressure remains constant
  • The pressure increases

    • What is the effect of the gas pressure change on the color marker?

    <p>It is pushed towards the boiling tube</p> Signup and view all the answers

    Which gas is absorbed by soda lime during the experiment?

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

    In comparing inhaled and exhaled air, which of the following is NOT a typical measurement used?

    <p>Nitrogen concentration</p> Signup and view all the answers

    What apparatus is used to collect inhaled and exhaled air?

    <p>Gas jar with cover plate</p> Signup and view all the answers

    Which of the following is an essential characteristic of inhaled air compared to exhaled air?

    <p>Lower oxygen content</p> Signup and view all the answers

    Which type of air causes the candle flame to extinguish faster?

    <p>Exhaled air</p> Signup and view all the answers

    What can be inferred about the oxygen content in inhaled air compared to exhaled air?

    <p>Inhaled air contains more oxygen</p> Signup and view all the answers

    What effect does exhaled air have on the hydrogencarbonate indicator?

    <p>It changes to yellow</p> Signup and view all the answers

    Why does inhaled air not change the color of the hydrogencarbonate indicator?

    <p>It has less carbon dioxide</p> Signup and view all the answers

    During the experiment, what is the likely reason for shaking the jar after adding the hydrogencarbonate indicator?

    <p>To mix the air with the indicator</p> Signup and view all the answers

    What is the primary reason for the candle burning longer in inhaled air?

    <p>Inhaled air contains more oxygen</p> Signup and view all the answers

    What is a significant difference between inhaled and exhaled air based on the experiments conducted?

    <p>Exhaled air has less oxygen</p> Signup and view all the answers

    Which property of exhaled air allows it to extinguish a candle flame more effectively?

    <p>Lower oxygen content</p> Signup and view all the answers

    What is the correct sequence of air pathways during inhalation?

    <p>Nasal cavity → Trachea → Bronchi → Air sacs</p> Signup and view all the answers

    Which of the following structures is NOT directly involved in the division of air pathways?

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

    In which part of the respiratory system do bronchioles end?

    <p>Air sacs</p> Signup and view all the answers

    What is the primary function of the trachea in the respiratory system?

    <p>To divide into bronchi</p> Signup and view all the answers

    Which statement accurately describes bronchi in the respiratory system?

    <p>They are the main air passages that branch from the trachea.</p> Signup and view all the answers

    Which structure directly follows the trachea in the airflow pathway?

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

    What role do air sacs play in the respiratory system?

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

    What is the primary purpose of the division of bronchi into bronchioles?

    <p>To increase surface area for gas exchange</p> Signup and view all the answers

    What should be avoided when handling dry cobalt chloride paper?

    <p>Touching it with bare hands</p> Signup and view all the answers

    Which action is necessary before applying cobalt chloride paper to the mirror?

    <p>Wipe the mirror with tissue paper</p> Signup and view all the answers

    What is the purpose of breathing onto the mirror during the experiment?

    <p>To introduce moisture for observation</p> Signup and view all the answers

    What is the correct procedure for cleaning the mirror after the experiment?

    <p>Use a disinfectant along with water</p> Signup and view all the answers

    What should be done if a student has symptoms of respiratory illness during the experiment?

    <p>Avoid participating in the breathing step</p> Signup and view all the answers

    Why is it important to record the color of the cobalt chloride paper after each step?

    <p>To analyze moisture levels accurately</p> Signup and view all the answers

    What is the primary function of cobalt chloride paper in this experiment?

    <p>To indicate the presence of water vapor</p> Signup and view all the answers

    What color change indicates the presence of moisture on cobalt chloride paper?

    <p>From blue to pink</p> Signup and view all the answers

    What is the primary function of the pathways shown in the diagram?

    <p>To facilitate oxygen absorption into the bloodstream</p> Signup and view all the answers

    During inhalation, which structure is primarily responsible for creating negative pressure in the thoracic cavity?

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

    Which of the following accurately describes the role of alveoli?

    <p>Site of gas exchange between air and blood</p> Signup and view all the answers

    What is the main difference between air flow during inhalation and exhalation?

    <p>Inhalation causes the thoracic cavity to expand, while exhalation results in contraction</p> Signup and view all the answers

    Which respiratory condition primarily affects the airflow pattern during exhalation?

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

    What occurs in the respiratory system when carbon dioxide levels in the blood rise?

    <p>The body signals to increase breathing rate</p> Signup and view all the answers

    Which disease is specifically mentioned as being related to smoking?

    <p>Lung cancer</p> Signup and view all the answers

    How many people approximately die from diseases related to smoking each year globally?

    <p>8 million</p> Signup and view all the answers

    Which statement is true regarding the air we exhale compared to the air we inhale?

    <p>Exhaled air contains higher levels of carbon dioxide.</p> Signup and view all the answers

    Which of the following muscles help expand the ribs during inhalation?

    <p>Intercostal muscles</p> Signup and view all the answers

    Which of the following is NOT listed as a smoking-related disease?

    <p>Cystic fibrosis</p> Signup and view all the answers

    What is a direct consequence of smoking as indicated in the content?

    <p>Increased risk of bronchitis</p> Signup and view all the answers

    Which of the following is incorrectly associated with smoking-related diseases?

    <p>Kidney failure</p> Signup and view all the answers

    Which statement regarding smoking and health is true based on the information?

    <p>Smoking contributes to multiple health problems.</p> Signup and view all the answers

    What is the relationship between smoking and stroke as presented?

    <p>Smoking increases the risk of stroke.</p> Signup and view all the answers

    Based on the content, which of the following is an effect of smoking on the lungs?

    <p>Causes bronchitis</p> Signup and view all the answers

    Study Notes

    Gas Exchange in Animals

    • Gas exchange occurs in animals as well as plants.
    • Practical 7.12 aims to study the change in carbon dioxide content in animals.

    Materials and Procedure (Practical 7.12)

    • Materials: Boiling tubes, forceps, cotton thread, stopper, test tube rack, measuring cylinder (10 cm³), hydrogencarbonate indicator, plastic vial with small holes, mealworms.
    • Procedure:
      • Add 3 cm³ of hydrogencarbonate indicator to two boiling tubes (A and B).
      • Record the indicator's color in each tube.
      • Place mealworms in a plastic vial, then place the vial inside tube A.
      • Securely stopper both tubes, ensuring no air leaks.
      • Leave the setup for an hour.
      • Record the indicator's color in each tube after one hour.

    Practical 7.13

    • Aim: To study the uptake or release of oxygen in animals.
    • Materials: Boiling tubes, wire gauze, ruler, soda lime, mealworms. Capillary tubes attached to stoppers (with colour marker inside the tubes).

    Discussion (Practical 7.12)

    • Tube B is a control setup to ensure accurate results.
    • Mealworms in tube A release carbon dioxide as indicated by the color change of the indicator (from red to yellow).
    • The indicator in tube B didn't change, showing no carbon dioxide production.

    Discussion (Practical 7.13)

    • The results show how mealworms consume oxygen during respiration and release carbon dioxide.

    Gas Exchange in Humans

    • Air is inhaled and exhaled continuously.
    • Inhaled and exhaled air differ in oxygen and carbon dioxide concentration.

    Practical 7.14 (Comparing Inhaled and Exhaled Air)

    • Aim: To compare oxygen, carbon dioxide, and water vapor content of inhaled and exhaled air.
    • Materials: Gas jar with cover plates, measuring cylinder (10 cm³), mirror, dry cobalt chloride paper, stopwatch, candle, insulating mat, gas lighter, hydrogencarbonate indicator, water trough.
    • Procedure:
      • Cover two gas jars.
      • Label the jars "inhaled air".
      • Fill a gas jar with water.
      • Blow into a drinking straw inserted into the other jar.
      • Repeat until filled with exhaled air.
      • Record the time needed for a lit candle to extinguish in each jar (inhaled/exhaled).
      • Repeat the procedure, but instead of candle, add hydrogencarbonate indicator to a new gas jar.

    Gas Exchange at Air Sacs

    • Oxygen and carbon dioxide exchange between air in the air sacs and capillaries (blood vessels).
    • Oxygen from inhaled air enters the blood, carrying oxygen to body cells.
    • Carbon dioxide produced by cells is transported to the air sacs.
    • The air sacs are moistened and warmed by the air.

    Difference Between Inhaled and Exhaled Air

    • Inhaled air has a higher oxygen content and lower carbon dioxide content than exhaled air.
    • Exhaled air has a higher water vapor content and warmer temperature than inhaled air.

    Effects of Smoking

    • Smoking damages the respiratory system, reducing gas exchange efficiency.
    • Tar deposits in the lungs, impacting the surface area of air sacs.
    • Carbon monoxide reduces blood's oxygen-carrying capacity.
    • Certain chemicals damage air sacs.

    Harmful Effects of Smoking

    • Smoking causes various diseases like lung cancer, mouth cancer, stomach cancer, bronchitis, and heart disease.
    • Smokers' life expectancy is significantly shorter.
    • Approximately 8 million people die annually from smoking-related diseases worldwide.

    Electronic Cigarettes

    • Electronic cigarettes use a battery-powered device to heat a liquid, producing a vapor that users breathe in.
    • The liquid can contain nicotine, flavourings, and other chemicals that may be harmful.

    Additional Information

    • The lungs are protected by the rib cage and diaphragm.
    • Different animals use different structures for gas exchange (e.g., gills in fish).

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    OCR Gas Exchange in Animals PDF

    Description

    Test your knowledge on the respiration process in mealworms. This quiz covers gas exchange, the effects of oxygen levels, and comparisons between inhaled and exhaled air. Answer questions about the gases involved and the apparatus used in experiments.

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