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Gaseous Exchange in Different Organisms.

Gaseous Exchange in Different Organisms. . Lesson 1. Gaseous exchange in insects. . Recap. Think SA:Vol . What is the difference between these two organism and how does this affect their gaseous exchange mechanisms? . Write your answer on a post-it note. .

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Gaseous Exchange in Different Organisms.

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  1. Gaseous Exchange in Different Organisms. Lesson 1. Gaseous exchange in insects.

  2. Recap Think SA:Vol. What is the difference between these two organism and how does this affect their gaseous exchange mechanisms? Write your answer on a post-it note. In your group, compare your answers. Sort them into order low grade  high grade. What improvements could have been made to the high grade answer?

  3. Gaseous Exchange in Insects. Objectives: -Apply knowledge of SA:Vol to gaseous exchange in insects. -Describe the features of the tracheal system in insects. -Describe how an insect is adapted to limit water loss. -Apply knowledge of diffusion to explain the adaptations of the tracheal system.

  4. Gaseous Exchange in Insects. • Read through the information on the tracheal system in bees. • Use this information and your own knowledge to answer the questions. • When you have answered the questions, mark your own using the answer sheet.

  5. Exam Question Changes that occur in the tracheolesthat supply muscle fibres during flight. During flight, the liquid in the tracheoles passes from the tracheole into the muscle fibre. (i) How does this change benefit gas exchange in the insect? (ii) Substances which are produced during metabolism cause the liquid in the tracheolesto pass into the muscle fibre during flight. Explain how. (iii) Suggest why a muscle fibre, in which the tracheoles are restricted to the outside of the fibre, cannot be larger than 20 μm in diameter. (5 marks)

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