Answer: It changes according to the oxygen requirement of the body. During inhalation, ribs move up and outwards and diaphragm moves down. During heavy exercise the breathing rate can increase upto 25 times per minute. (d) moist and slimy, Question 6. List the similarities and differences between aerobic and anaerobic respiration. During exhalation, ribs move down and inwards, while diaphragm moves up to its former position. What is that new product. Anaerobes respire using anaerobic mode. By practising these questions, students can answer any type of question asked from this chapter in the examination. The carbon dioxide produced during respiration is brought back by the blood into the gills and expelled into the surrounding water. Question 27. Question 17. Animal B has specific organs to respire in the water which is not found in any other water animal. (c)-(i) Answer: Normally we are breathing at a slower rate but during physical activities, to make sufficient amount of O2 reaching cells we breathe faster. Refer to text on page 141. (c) Both (a) and (b) Glucose is partially broken into lactic acid which causes body cramps. (a) Alcohol and lactic acid Sometimes when we do heavy exercise, anaerobic respiration takes place in our muscle cells. Answer: Identify them. These animals breathe in through their nostrils and lungs. Answer: It takes place in the cells of organisms. The respiratory organ of the following animals are as follows Certain small pores are present on the surface of plant through which gaseous exchange occurs. Question from very important topics are covered by NCERT Exemplar Class 7.You also get idea about the type of questions and method to answer in your Class … (a) glucose (a) lungs, Question 9. The cellular respiration process takes place in which cell organelle? Class 7 Science Solved Q&A Nutrition in Plants Nutrition in Animals Fibre to Fabric Heat Acids, Bases and Salts Physical and Chemical Changes Weather,Climate And Adaptation Wind Storms and Cyclones Soil Respiration in Organisms Transportation in Animals and Plants Reproduction in Plants Motion and Time Electric Current and its Effect Light Water A Precious Resource … The skin of an earthworm feels moist and slimy on touching. How does this organism help in beverage and baking industry? (b) Why did the dough smell sour? (a) The plants do not possess any respiratory system still plants respire. Answer: They agreed to do so and promised not to repeat then mistake. The rapid breakdown of food makes us to feel more hungry. Answer: (b) swimming True Take three test-tubes. These words may be present in any direction – upwards, downwards, or along the diagonals. (a) Figure A indicates inhalation and figure B indicates exhalation. We hope the given NCERT MCQ Questions for Class 7 Science Chapter 10 Respiration in Organisms with Answers Pdf free download will help you. True, Question 1. Earthworms and frogs breathe through their skin because of which the skin of both the organisms is Answer: Root cells get oxygen from the air present in the space between the soil particles. Observe the given figures carefully.and answer the following questions. The breathing rate during exercise is increased while during sleep it goes down. When we feel drowsy, sleepy or tired, we yawn (i.e. (b) Can infections be passed from one person to another via sneezing? Cockroaches breathe with the help of air tubes called ………….. . (d) What would have happened if the dough was kept in the refrigerator, soon after it was prepared? Why? Tick the correct answer: (a) In cockroaches, air enters the body through (i) lungs (ii) gills (iii) … Answer: (b) The massage or hot water bath gives the relief from muscle cramp or pain, because it improves the circulation of blood leading to increase supply of oxygen to the muscle cells. (b) Roots of the plants respire under the ground. (a) The dough rises due to the release of carbon dioxide during anaerobic respiration by yeast cell. Answer: During this process O2 is released as a byproduct and a balance between O2 and CO2 is maintained in the atmosphere. How do they carry out respiratory process? MCQ Questions for Class 7 Science Chapter 10 Respiration in Organisms with Answers 1. This helps the root to respire through the air present in the space between soil particles. Question 5. Smoking is considerd harmful due to certain effects. Question 9. 6. Question 1. Is the rate of breathing same for all the respiring organism? Answer: How does it differ from anaerobic respiration? Write the equation for breakdown of food in anaerobic respiration. Like other living organisms, plants also respire for their survival. He thought that fish will be more comfortable in luke warm water than cold water. In the cells oxygen is used to break down glucose into carbon dioxide and water as in other organisms. Question 6. This chapter will clearly explain the differences using proper examples. Answer: It lies between pharynx and trachea. Answer: Why does an athlete breathe faster and … Thus, it needs to be a continuous process. Answer: Yeast is used in wine and beer industries because it respires Answer: Question 7.Mark ‘T’ if the statement is true and ‘F’ if it is false: (i) During heavy exercise the breathing rate of person slows down. It can be seen from many miles away. Our nostrils possess hairs and mucous lining. (b) The plant roots being underground respire by using which mechanism? This oxygen is then carried to all the parts of fishes for respiration. Now group them as follows: He added a pinch of yeast and sugar to the dough and left it in a warm place. Answer: (a) walking Question 3. Answer: (b) heart 7. inhalation When it stays at land is respire through lungs but when it goes into water, it respires through its moist skin. Answer: Find the words for your respiratory system. Question 13. (c) down and outwards Answer: Aerobic respiration. Answer: What happens and give reason for its occurrence? (b) Yes. Answer: Question 4. Types of Respiration (a) What can be the possible reasons for the pain in her legs? (a) take in oxygen from air Students can get how to tackle different questions easily by solving the Extra Questions for Class 7 Science Question bank on a regular basis. (b) bakery industry There blow holes are located on the upper parts of their heads. These organs are located according to their functions. It takes place in the cells of organisms. Question 18. (a) Write any three hazards of smoking. The oxygen rich air enters through the skin. Answer. (d) Tadpole, as it breathes through gills and do not have lungs. The lungs get filled with air. Question 1. The fishes have special type of organs for respiration called gills. Therefore, it is not advisable to sleep under trees during night because the person will suffer from suffocation and feel excess weight on chest. Palak understood and promised herself to move show and steadily. The human respiratory system have following organs: (a) lungs (d) None of these Explain why. Answer: (b) The animal that can breathe through skin as well as through lungs. Fishes are the aquatic animals that live in water. (b) Yeast, during anaerobic respiration also produces alcohol which results in the sour smell of dough. This is because when a whale breathes air out of its blow hole it appears as a spray or misp, also called as spont. Answer: (a) During emergency conditions (e.g. Spiracles are fewer in number as compared to stomata. (b) take in oxygen dissolved in water, Question 5. Answer: (b) go to sleep Respiration in Organisms Class 7 Extra Questions Very Short Answer Type. Internally, they have a network of air tubes called tracheae for gas exchange rich air rushes through spiracles into the tracheal tubes, diffuses into the body tissue, and reaches every cell of the body. 2. (d) sleeping, Question 7. Have a glance at the MCQ of Chapter 10 Science Class 7 and cross-check your answers during preparation. What is their use? Where does cellular respiration take place? Question 2. (c) anaerobically producing alcohol, Question 3. It is the process of breakdown of food in the presence of oxygen. (b) Human being – lungs. Answer: 5. Insects and leaves of a plant have pores through which they exchange gases with the atmosphere. (a) bronchi 1. (b) Why did she fell comfortable after a massage? Can you write two points of differences between these pores with respect to their position, number and extension into the body?
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