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NCERT Solutions for Class 7 Science Chapter 6 Respiration In Organisms

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Class 7 Science Chapter 6 Respiration in Organisms Questions with Answers FREE PDF Download

Vedantu’s Chapter 6, Respiration In Organisms Class 7 Questions With Answers, offers comprehensive guidance on understanding "Respiration in Organisms." This chapter discusses the processes involved in respiration and its significance in living organisms. By downloading the Respiration In Organisms Class 7 PDF, students can access detailed explanations and solutions to all questions asked in the chapter. NCERT Solutions for Class 7 Science are prepared to improve understanding and encourage deeper comprehension, making them essential resources for students preparing for their exams.

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Download the FREE PDF of NCERT Class 7th Science Chapter 6 Question And Answer. These NCERT Solutions are prepared by Vedantu Experts and are updated according to the Class 7 Science syllabus. Begin your journey toward academic success with Vedantu!


Class 7 Science Chapter Respiration In Organisms: Quick Insights

  • Science Class 7 Chapter 6 Respiration In Organisms discusses the process of respiration in organisms, explaining how living beings acquire energy from food through breathing.

  • Class 7 Science Chapter 6 Question Answer explains the steps involved in respiration, including breathing, exchange of gases, and cellular respiration, highlighting their significance in sustaining life.

  • Class 7 Science Chapter 6 PDF Question Answer provides visual aids such as diagrams and illustrations to understand the respiratory system and its functioning better.

  • Science Chapter 6 Class 7 solutions demonstrate real-life applications of respiration concepts, showing how different organisms respire in various environments.

  • Utilising these Class 7 Science Chapter 6 Question Answers can help students assess their level of preparation and understanding of respiration and breathing.

  • The chapter is aligned with the revised syllabus for the academic year 2024-25 and offers resources such as class notes, important concepts, and exemplar solutions.

Access NCERT Solutions for Class 7 Science Chapter 6 – Respiration in Organisms

1. Why Does an Athlete Breathe Faster and Deeper than Usual After Finishing the Race?

Ans: Running requires a lot of energy, and ATP is produced by the breakdown of glucose, which is a rapid source of energy. As a result, while running, all of the reserve energy is used, and more oxygen is required for the generation of fresh ATP. As a result, following the race, the athlete breathes faster.


2. List the Similarities and Differences Between Aerobic and Anaerobic Respiration.

Ans: Similarities include: 

i. The release of energy.

ii. Carbon dioxide is released into the atmosphere.

Differences: 

i. Anaerobic feeding occurs in the absence of oxygen, whereas aerobic respiration necessitates the presence of oxygen.

ii. In aerobic respiration, glucose is entirely broken down, but in anaerobic respiration, incomplete oxidation occurs.


3. Why Do We Often Sneeze When We Inhale a Lot of Dust-Laden Air?

Ans: When we inhale air, undesired particles such as dust, dirt, pollen, and smoke enter our respiratory system, causing irritation in the nasal cavity. This causes sneeze.


4. Take Three Test Tubes. Fill 3/4th 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?

Ans: Test tube-A. 

The maximum concentration of carbon dioxide will be found in test tube A. The snail's respiration produces carbon dioxide (CO2). Snail is an organism that takes in oxygen and exhales carbon dioxide. As a result, the concentration of CO2 in test tube A rises.


5. Tick the Correct Answer: 

i. In Cockroaches, Air Enters the Body Through

i. Lungs

ii. Gills 

iii. Spiracles

iv. Skin

Ans: Spiracles

ii. During Heavy Exercise, We Get Cramps in the Legs Due to the Accumulation Of

i. Carbon Dioxide 

ii. Lactic Acid

iii. Alcohol

iv. Water

Ans: lactic acid

iii. The 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

Ans: 15-18

iv. During Exhalation, the Ribs 

i. Move Outwards 

ii. Move Downwards 

iii. Move Upwards

iv. Do Not Move at All.

Ans: Move downwards


6. Match the Items in Column I with Those in Column II 

Column I 

Column II 

Yeast 

Diaphragm 

Skin 

Leaves

Fish 

Frog

Earthworm 

Gills 

Alcohol

Chest cavity

Stomata

Tracheae


Ans : 

Column I 

Column II 

Yeast 

Diaphragm 

Skin 

Leaves

Fish 

Frog

Alcohol 

Chest cavity

Earthworm

Stomata

Gills

Tracheae


7. Mark ‘T’ If the Statement is True and ‘F’ If it is False:

  1. During Heavy Exercise, the Breathing Rate of a Person Slows Down.

Ans: False, When we exercise, our bodies move, which necessitates more energy to complete the task and enough oxygen for organs to function properly. Following the exercise, a person requires additional carbon dioxide to expel the carbon dioxide produced during the exercise. 

  1. Plants Carry Out Photosynthesis Only During the Day and Respiration Only at Night. 

Ans: False, Plants only photosynthesize during the day when the sun is shining, yet they respire all day and night.

  1. Frogs breathe through their skins as well as their lungs.

Ans: True.

  1. The Fishes have Lungs for Respiration.

Ans: False, The gills allow the fish to breathe. Fishes are devoid of lungs.

  1. The Size of the Chest Cavity Increases During Inhalation.

Ans: True.


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 These Words Are Given Below the Square. 

  1. The Air Tubes of Insects. 

  2. The Skeletal Structure Surrounding the Chest Cavity. 

  3. The Muscular Floor of the Chest Cavity. 

  4. Tiny Pores on the Surface of the Leaf. 

  5. Small Opening on the Sides of the Body of an Insect. 

  6. The Respiratory Organ of Human Beings. 

  7. The Opening Through Which We Inhale. 

  8. An Anaerobic Organism.

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Ans : 

S

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S   (iv)

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N  (vii)

T   (i)

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9. the Mountaineers Carry Oxygen With Them Because----------------. 

Ans: The amount of air accessible at that altitude is significantly smaller than on land. Therefore, mountaineers carry oxygen with them. 


NCERT Science Chapter 6 Class 7- Quick Overview of Topics Covered

S. No

Topics of Respiration in Organisms Class 7

1.

Why do we Respire?

2.

Breathing

3.

How do we Breathe?

4.

What do we Breathe Out?

5.

Breathing in other Animals

6.

Breathing Under Water

7.

Do Plants also Respire? 


Science Class 7 Chapter 6 - Important Points

  1. Respiration is the process by which organisms take in oxygen and release carbon dioxide to produce energy from food.

  2. It provides the energy required for various physiological activities and the maintenance of life.

  3. The taking in of air rich in oxygen into the body is called inhalation, and giving out of air rich in carbon dioxide is known as exhalation.


Types of Respiration

  • Aerobic Respiration: Occurs in the presence of oxygen, producing more energy along with carbon dioxide and water as by-products.

  • Equation: Glucose + Oxygen → Carbon Dioxide + Water + Energy

  • Anaerobic Respiration: Occurs in the absence of oxygen, producing less energy. Common in certain bacteria, yeast, and muscle cells during intense exercise.

  • Equation: Glucose → Lactic Acid + Energy (in muscles)

  • In yeast: Glucose → Ethanol + Carbon Dioxide + Energy


  1. Respiratory System in Humans

  • Components: Includes the nasal cavity, trachea, bronchi, lungs, and diaphragm.

  • Mechanism: Air is inhaled through the nose, passes down the trachea and bronchi, and reaches the lungs. Oxygen is exchanged for carbon dioxide in the alveoli (tiny air sacs).

  • Breathing Process: Involves inhalation (taking in oxygen) and exhalation (releasing carbon dioxide).


  1. Respiration in Other Organisms

  • Plants: Respire through tiny openings called stomata. During the day, photosynthesis predominates, but respiration occurs all the


Benefits of Vedantu’s NCERT Class 7th Science Chapter 6 Question and Answer

Referring to NCERT solutions for Respiration In Organisms, Class 7 offers several benefits:


  • Respiration In Organisms Class 7 Questions With Answers provides clear and concise explanations of concepts covered in the chapter, helping students understand the topic of respiration in organisms thoroughly.

  • Respiration In Organisms Class 7 PDF Covers critical topics such as the types of respiration (aerobic and anaerobic), the human respiratory system, and respiration in plants and animals.

  • Class 7 Science Chapter 6 PDF Question Answer assists students in completing their last-minute revision efficiently and effectively, ensuring they are well-prepared for their exams.

  • Detailed methodologies for understanding the mechanisms of respiration, including the breathing process and gas exchange in different organisms.

  • Respiration in Organisms Class 7 solutions include practice questions and exercises that allow students to test their understanding of the concepts discussed in the chapter, reinforcing their learning.

  • By referring to Class 7 Science Chapter Respiration In Organisms Solutions, students can prepare effectively for exams as the solutions cover all the topics and questions likely to be asked in the assessments.

  • Students can use Science Class 7 Chapter 6 PDF solutions to assess their understanding and identify areas where they may need further practice or clarification, enabling them to improve their performance.


Important Study Materials for Science Chapter 6 Respiration in Organisms Class 7

For more insights, students can also download additional study materials provided by Vedantu for Science Class 7 Chapter 6 –



Conclusion

Vedantu’s NCERT Solutions for Class 7 Science Chapter 6: Respiration in Organisms is an excellent resource for understanding this vital biological process. It provides clear and simple explanations, making it easier for students to grasp concepts like the respiratory system, aerobic and anaerobic respiration, and the importance of breathing. Students should focus on understanding the function of different organs involved in respiration and the differences between various types of respiration. Previous year question papers often include 5-7 questions from this chapter, emphasising key concepts and processes. Using Vedantu’s solutions, students can effectively prepare and excel in their exams.


NCERT Solutions for Class 7 Science - Chapter-wise Link for FREE PDF

Dive into our collection of FREE PDF links offering chapter-wise NCERT solutions, prepared by Vedantu Experts to help you understand and master fundamental scientific concepts.



Important Related Links for NCERT Class 7 Science

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FAQs on NCERT Solutions for Class 7 Science Chapter 6 Respiration In Organisms

1. What are the main steps involved in the process of respiration in organisms as per NCERT Solutions for Class 7 Science Chapter 6?

The main steps of respiration in organisms include:

  • Inhalation – Taking in oxygen-rich air into the lungs.
  • Exchange of gases – Oxygen from the air is absorbed into the blood and carbon dioxide is released from the blood into the lungs.
  • Exhalation – Expelling carbon dioxide-rich air out of the body.
  • Cellular respiration – Cells use oxygen to break down glucose and produce energy, releasing carbon dioxide and water as by-products.

2. How does aerobic respiration differ from anaerobic respiration according to NCERT Class 7 Science Chapter 6?

Aerobic respiration occurs in the presence of oxygen and breaks down glucose completely to release more energy, water, and carbon dioxide. In contrast, anaerobic respiration takes place without oxygen, breaks down glucose partially, and produces less energy along with by-products like lactic acid (in muscles) or alcohol (in yeast).

3. Why do athletes breathe faster and deeper after vigorous physical activity, as explained in NCERT Solutions for Class 7 Science Chapter 6?

After vigorous exercise, athletes breathe faster and deeper because their body’s demand for energy increases, leading to rapid production of ATP. More oxygen is needed to release additional energy and remove excess carbon dioxide produced by muscle activity.

4. What are the main components of the human respiratory system mentioned in NCERT Solutions for Class 7 Science Chapter 6?

The human respiratory system is made up of the following major parts:

  • Nasal cavity
  • Trachea (windpipe)
  • Bronchi
  • Lungs
  • Diaphragm
These structures work together to ensure efficient breathing and gas exchange.

5. How do plants respire, as described in Class 7 Science Chapter 6 NCERT Solutions?

Plants respire through tiny pores called stomata, mainly on the leaves. They take in oxygen from the air and release carbon dioxide throughout the day and night. During the day, both respiration and photosynthesis occur, but at night only respiration takes place.

6. What is the significance of the exchange of gases in respiration as per NCERT Solutions for Class 7 Science Chapter 6?

The exchange of gases is vital because it supplies oxygen needed for energy production to the body’s cells and removes carbon dioxide, a waste product that must be exhaled to maintain internal balance and prevent toxicity.

7. What causes muscle cramps during heavy exercise, according to the solutions for Class 7 Science Chapter 6?

Muscle cramps during heavy exercise occur due to the accumulation of lactic acid produced during anaerobic respiration, as the muscles temporarily lack sufficient oxygen to meet energy demands.

8. How is breathing in aquatic animals like fish different from breathing in humans, as per NCERT Solutions?

Fish and other aquatic animals use gills to extract dissolved oxygen from water, whereas humans use lungs to absorb oxygen from the air. Fishes lack lungs and their gills allow efficient gas exchange even in water.

9. Why do mountaineers carry oxygen cylinders, explained as per NCERT Solutions for Class 7 Science Chapter 6?

Mountaineers carry oxygen cylinders because the availability of oxygen in the air decreases at higher altitudes. This helps them breathe efficiently and avoid altitude sickness caused by low oxygen levels.

10. What happens to the size of the chest cavity during inhalation and exhalation, as per Class 7 Respiratory System explanation?

During inhalation, the chest cavity expands because the diaphragm contracts and moves downward and the ribs move outward, allowing air to enter the lungs. During exhalation, the chest cavity shrinks as the diaphragm relaxes and moves upward and the ribs move inward, pushing air out of the lungs.

11. How do NCERT Solutions for Class 7 Science Chapter 6 help students prepare for exams?

The solutions provide step-by-step explanations for each question, reinforce key concepts of respiration, and include CBSE pattern answers for thorough preparation, revision, and practice as per the current syllabus.

12. What is the normal breathing rate of an adult at rest as per Class 7 Science Chapter 6?

The normal range of breathing rate for an adult at rest is 15–18 breaths per minute, as stated in NCERT guidelines.

13. Why do we often sneeze when exposed to dust-laden air, according to Class 7 NCERT Solutions?

Sneezing occurs because irritants like dust and pollen enter the nasal cavity and trigger a defense mechanism that expels these particles to protect the respiratory tract.

14. What are some misconceptions about respiration in plants addressed in NCERT Solutions for Class 7 Science Chapter 6?

A common misconception is that plants only respire at night and photosynthesize during the day. In reality, plants respire both day and night, but photosynthesis takes place only in the presence of sunlight.

15. How does the process of gas exchange in the alveoli support efficient respiration, as explained in NCERT Class 7 Science Chapter 6?

The alveoli are tiny air sacs in the lungs where oxygen from inhaled air diffuses into the blood and carbon dioxide diffuses from the blood into the alveoli to be exhaled, maximizing gas exchange surface area and supporting efficient respiration.