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Respiration in Organisms Chapter 10 Class 7 Science
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568 students

Respiration in Organisms Chapter 10 Class 7 Science

Respiration in Organisms Chapter 10 Class 7 Science
Created byPrabh Kirpa Classes
Last updated 9/2021
English

What you'll learn

  • Students will gain a comprehensive understanding of the respiratory processes in humans, plants, and animals.
  • They will learn why breathing patterns change during physical activities and how organisms adapt to different environments for respiration.
  • Through comparisons of aerobic and anaerobic respiration, they will identify their key differences and similarities.
  • Hands-on experiments will help students understand the role of CO2 in living systems.
  • They will also explore the physiological reasons behind sneezing and breathing challenges at higher altitudes.
  • Interactive exercises like quizzes and puzzles help students strengthen their understanding of respiratory systems across species.

Course content

2 sections • 5 lectures • 33m total length

  • Introduction3:25

    Q.1. Why does an athlete breathe faster and deeper than usual after finishing the race?

    Q.2. List the similarities and differences between aerobic and anaerobic respiration.

    Q.3.. Why do we often sneeze when we inhale a lot of dust-laden air?

    Q.4. Take three test-tubes. Fill ¾th of each with water. Label them A, B and C. Keep a snail in test-tube A, a water plant in test-tube B and in C, keep snail and plant both. Which test-tube would have the highest concentration of CO2?

    Q.5.Tick the correct answer:

    (a) In cockroaches, air enters the body through

    (i) lungs              (ii) gills             (iii) spiracles               (iv) skin

    (b) During heavy exercise, we get cramps in the legs due to the accumulation of

    (i)carbon dioxide                     (ii) lactic acid            (iii) alcohol             (iv) water

    ( c ) Normal range of breathing rate per minute in an average adult person at rest is:

    (i) 9–12             (ii) 15–18              (iii) 21–24                 (iv) 30–33

    (d) During exhalation, the ribs

    (i) move outwards                  (ii) move downwards

    (iii) move upwards                 (iv) do not move at all

    Q.6. Match the items in Column I with those in Column II:

    Column I                 Column II

    (a) Yeast                 (i) Earthworm

    (b) Diaphragm      (ii) Gills

    (c) Skin                 (iii) Alcohol

    (d) Leaves            (iv) Chest cavity

    (e) Fish                (v) Stomata

    (f) Frog                (vi) Lungs and skin

                                (vii) Tracheae

    Q.7. Mark ‘T’ if the statement is true and ‘F’ if it is false:

    (i) During heavy exercise the breathing rate of a person slows down. (T/F)

    (ii) Plants carry out photosynthesis only during the day and respiration only at night. (T/F)

    (iii) Frogs breathe through their skins as well as their lungs.(T/F)

    (iv) The fishes have lungs for respiration. (T/F)

    (v) The size of the chest cavity increases during inhalation. (T/F)

    Q. 8. Given below is a square of letters in which are hidden different words related to respiration in organisms. These words may be present in any direction — upwards, downwards, or along the diagonals.

    Find the words for your respiratory system. Clues about those words are given below the square.

    Q. 9. The mountaineers carry oxygen with them because:

    (a) At an altitude of more than 5 km there is no air

    (b) The amount of air available to a person is less than that available on the ground.

    (c) The temperature of air is higher than that on the ground.

    (d) The pressure of air is higher than that on the ground.

Requirements

  • Nil

Description

This course provides an engaging exploration of respiratory processes in humans, plants, and animals, along with their practical implications. The content is structured around a variety of interactive and thought-provoking questions to promote critical thinking and scientific inquiry.

1.Post-Exercise Breathing: Investigate why athletes breathe faster and deeper after completing a race, and understand the physiological need for oxygen recovery.

2.Respiratory Comparisons: Compare and contrast aerobic and anaerobic respiration to highlight their similarities and differences.

3.Dust and Sneezing: Explore the body's natural defense mechanisms, such as sneezing, when exposed to dust-laden air.

4.Experimentation with Respiration: Conduct an experiment using test tubes to understand CO2 concentration in environments containing snails, plants, or both.

5.Multiple-Choice Questions: Test your understanding of concepts like air entry in cockroaches, muscle cramps during exercise, normal breathing rates, and rib movement during exhalation.

6.Matching Pairs: Match items in Column I, such as yeast, diaphragm, and fish, with corresponding characteristics in Column II to solidify your understanding.

7.True or False Statements: Assess statements about exercise, plant respiration, frog breathing, fish lungs, and chest cavity movement.

8.Word Puzzle: Uncover hidden words related to respiration in a grid, guided by provided clues.

9.Altitude and Oxygen: Examine why mountaineers carry oxygen to higher altitudes and the challenges of breathing in such conditions.

This course blends theory with practical tasks to enhance your knowledge of respiratory systems across various organisms.

Who this course is for:

  • Respiration in organisms Class 7 Science

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