Respiration in organisms class 7 notes

Respiration Definition “Respiration is defined as a metabolic process wherein, the living cells of an organism obtains energy (in the form of ATP) by taking in oxygen and liberating carbon dioxide from the oxidation of complex organic substances.” (The above statement refers to the biochemical definition of respiration) Table of Contents • • • • • What is Respiration? Respiration is a metabolic process that occurs in all organisms. It is a biochemical process that occurs within the cells of organisms. In this process, the energy (ATP-Adenosine triphosphate) is produced by the breakdown of glucose which is further used by cells to perform various functions. Every living species, from a single-celled organism to dominant multicellular organisms, performs respiration. Let us have a detailed look at the different types of respiration in organisms. Also Read: Aerobic respiration It is a type of cellular respiration that takes place in the presence of oxygen to produce energy. It is a continuous process that takes place within the cells of animals and plants. This process can be explained with the help of the chemical equation: Glucose(C 6H 12O 6) + Oxygen(6O 2) → Carbon dioxide(6CO 2) + Water(6H 2O)+  Energy (ATP) Phases of Respiration in Organisms Respiration occurs in the cytosol and around the plasma membrane in prokaryotic cells. In This process is very much similar to internal combustion of the car engine, wherein organic compounds and oxygen go in, while water and car...

Class 7 Respiration In Organisms Complete+Extra Notes is important for the students of 7th standard. Notes are provided here in such a way that students can understand the Chapter in an interesting way. This Class 7 Respiration In Organisms Complete+Extra Notes could provide extra benefits in excelling a students curriculum . Students should practice their solutions regularly to prepare effectively for their examination. Class 7 Respiration In Organisms Complete+Extra Notes are outlined for students to easily understand the concepts. Hope students would be benefited . Respiration In Organisms – Fullnoteshub.com Tick the correct option 1. Where does gaseous exchange take place in an earthworm ? a. moist skin b. lungs c. gills d. body surface Ans : a. moist skin 2. What is utilized during respiration to release energy ? a. protein b. lactic acid c. glucose d. cellulose Ans : c. glucose 3. In which type of habitat do animals that respire through gills live ? a. aquatic b. grasslands c. terrestrial d. desert Ans : a. aquatic 4. Which gas is released when human beings respire ? a. oxygen b. hydrogen c. ozone d. carbon dioxide Ans : d. carbon dioxide 5. What is not required for anaerobic respiration ? a. energy b. glucose c. oxygen d. carbon dioxide Ans : c. oxygen 6. Where does gaseous exchange take place in butterflies ? a. stomata b. spiracles c. air sacs d. feelers Ans : b. spiracles 7. What transports oxygen to every part of the body ? a. blood b. lungs c. water d. trachea ...

Respiration • The cells in our body perform functions like growth, excretion, reproduction, etc. • The cells in our body perform functions like growth, excretion, reproduction, etc. A cell needs energy to perform these functions. The food we take in is converted into glucose by the digestive system. Glucose reaches the cells through the blood • In the presence of oxygen, glucose is broken down into energy, water and carbon dioxide. Anaerobic respiration takes place in the muscle cells if enough oxygen is not present in the cell. • Glucose is converted into lactic acid and carbon dioxide in the absence of oxygen. Accumulation of lactic acid inside the cells leads to muscle cramps. Oxygen will break down lactic acid into carbon dioxide and water. Yeast respires in the absence of oxygen • Glucose is converted into alcohol and carbon dioxide by yeast in the absence of oxygen. Yeast is used in beverage industries to produce beer and wine. • During day time, plants utilise oxygen to perform photosynthesis. • During the night, plants release carbon dioxide and take in oxygen for respiration. • In plants, the exchange of gases takes place through a special structure, called the stomata. The process of respiration in plants breaks down glucose and releases energy. • The energyreleased from food is useful in activities like growth, excretion, reproduction, running, reading and sleeping. • The foodwe eat has to be converted into glucose for releasing energy. Digestive juices convert ...

1. Define cellular respiration. Ans: Cellular respiration is the process of breakdown of food in the cells to release energy. Cellular respiration is of two types: Aerobic respiration. Anaerobic respiration. 2. Why does an athlete breathe faster and deeper than usual after finishing the race? Ans: An athelete breathes faster and deeper than usual after finishing the race so that more oxygen could reach his/her muscle cells. During the race, lactic acid is produced in atheletes' muscles. The oxygen then breaks down lactic acid into carbon dioxide (CO2) and water (H2O). 3. List the similarities and differences between aerobic and anaerobic respiration. Ans: Similarities: Both aerobic and anaerobic respiration uses glucose to release energy. Differences: Aerobic respiration takes place in presence of oxygen whereas anaerobic respiration takes place in absence of oxygen. In aerobic respiration, Carbon dioxide is formed where as in anaerobic respiration, alcohol or lactic acid is formed. 4. Why do we often sneeze when we inhale a lot of dust-laden air? Ans: The dust laden air irritates the inner lining of respiratory track. Hence, we sneeze to expel it out. 5. 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? Ans: Test tube A would have the highest concentration of CO2 as snail would release CO2 duri...

Cellular Respiration → It is the process in which food is broken down in the cell to release energy. → It occurs in the cells of all living organisms. Two types of Respiration (i) Aerobic respiration It is the process of breakdown of food in the presence of oxygen. It occurs in all organisms. It leads to production of carbon dioxide, water, and energy. → Plants respire through tiny pores present on their leaves surface called stomata. → Oxygen enters the plant, while carbon dioxide leaves the plant through these pores. → Roots of plants respire through air spaces present in the soil. Respiration → All living organisms require a continuous supply of energy for carrying out various life activities. → Cellular respiration is the process of releasing energy from the breakdown of organic substances. → The released energy is stored in the form of ATP. → ATP is the energy currency of cell. → The process of cellular respiration occurs in cytoplasm and mitochondria. → It involves the consumption of oxygen and liberation of CO 2and water. → The equation of respiration is C 6H 12O 6+ 6O 2→ 6CO 2+ 6H 2O + Energy Respiration in microorganisms → Amoeba respires through surface of the skin by the process known as diffusion. → Respiration in land animals → A cockroach has small openings on the sides of its body, which are known as spiracles. → The oxygen rich-air enters through spiracles. → The spiracles are connected to a network of tubes, called tracheae, for gaseous exchange. → Earthwo...

Read and download free pdf of Class 7 Respiration in Organisms Notes for exams. Students and teachers of Class 7 Science can get free advanced study material, revision notes, sure shot questions and answers for Class 7 Science prepared as per the latest syllabus and examination guidelines in your school. Class 7 students should download this study material which will give them more knowledge for all chapters in Science and all important topics which are scoring and can get you more marks. Students should also download free pdf of Chapter wise Study Material for Class 7 Science Chapter 10 Respiration in Organisms Class 7 Science students should refer to the following Pdf for Chapter 10 Respiration in Organisms in Class 7. These notes and test paper with questions and answers for Class 7 Science will be very useful for exams and help you to score good marks Class 7 Science Chapter 10 Respiration in Organisms Class 7 Respiration in Organisms Notes for exams. There are many more useful educational material which the students can download in pdf format and use them for studies. Study material like concept maps, important and sure shot question banks, quick to learn flash cards, flow charts, mind maps, teacher notes, important formulas, past examinations question bank, important concepts taught by teachers. Students can download these useful educational material free and use them to get better marks in examinations. Also refer to other worksheets for the same chapter and other s...

CBSE Class 7 Science Notes Chapter 10 Respiration in Organisms Pdf free download is part of CBSE Class 7 Science Notes Chapter 10 Respiration in Organisms Each cell of an organism performs functions like nutrition, transport, excretion and reproduction for this purpose, it needs energy. Our food is stored energy which is released during respiration. Breathing is the process during which, we breathe in air having oxygen and we breathe out air rich in carbon dioxide. The air rich in oxygen is transported to all parts of the body and ultimately to each cell. This oxygen is utilised by the cell for respiration. Tbe process of breakdown of food in the cells of an organism with the release of energy is called cellular respiration. Types of Respiration On the basis of the presence or absence of oxygen, respiration is classified into two types: 1. Aerobic Respiration When the breakdown of glucose occurs with the use of oxygen, it is called aerobic respiration. During aerobic respiration, glucose is completely broken down into carbon dioxide and water and energy is released. Aerobic respiration takes place in mitochondria. It can be shown by the following equation: Glucose(food) \(\underrightarrow \) Lactic acid + Energy This ours because during vigorous physical activity, the utilisation of oxygen ours at a faster rate in the muscles that can be supplied by the blood. When the lactic acid produced during anaerobic respiration, gets accumulated in the muscles, it causes muscle cram...