(b) The amount of air available to a person is less than that available on the ground. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-10/
(b) The amount of air available to a person is less than that available on the ground.
During heavy exercise, we get cramps in the legs due to the accumulation of (ii) lactic acid. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-10/
During heavy exercise, we get cramps in the legs due to the accumulation of (ii) lactic acid.
Normal range of breathing rate per minute in an average adult person at rest is (ii) 15–18. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-10/
Normal range of breathing rate per minute in an average adult person at rest is (ii) 15–18.
Living organisms release CO2 during respiration whereas plant utilize CO2 for photosynthesis. So, the test tube A will have the highest concentration of carbon dioxide because the carbon dioxide as it comes only by respiration of snail. In test tubes B and C, a part of the carbon dioxide is utilizedRead more
Living organisms release CO2 during respiration whereas plant utilize CO2 for photosynthesis. So, the test tube A will have the highest concentration of carbon dioxide because the carbon dioxide as it comes only by respiration of snail. In test tubes B and C, a part of the carbon dioxide is utilized by the plant for photosynthesis and hence there is less concentration of carbon dioxide.
When dust particles enter our nostril, it triggers a message to the brain. The brain instructs the nasal chamber to initiate sneezing. This is a method to remove the unwanted dust particles from the nostrils. Sneezing is a type of defence mechanism used by our body. https://www.tiwariacademy.com/nceRead more
When dust particles enter our nostril, it triggers a message to the brain. The brain instructs the nasal chamber to initiate sneezing. This is a method to remove the unwanted dust particles from the nostrils. Sneezing is a type of defence mechanism used by our body.
• Similarities: Food is oxidized in both cases and energy is released. • Differences: Carbon dioxide and water are the end products of aerobic respiration, while alcohol is the end product of anaerobic respiration. Aerobic respiration releases more energy than anaerobic respiration. https://www.tiwaRead more
• Similarities: Food is oxidized in both cases and energy is released.
• Differences: Carbon dioxide and water are the end products of aerobic respiration, while alcohol is the end product of anaerobic respiration. Aerobic respiration releases more energy than anaerobic respiration.
When the athlete runs in the race, his body needs more energy. In order to get extra energy, the athlete breathes faster. Because more oxygen is supplied to our cells. It speeds up the breakdown of food and more energy is released. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapteRead more
When the athlete runs in the race, his body needs more energy. In order to get extra energy, the athlete breathes faster. Because more oxygen is supplied to our cells. It speeds up the breakdown of food and more energy is released.
The mountaineers carry oxygen with them because:
(b) The amount of air available to a person is less than that available on the ground. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-10/
(b) The amount of air available to a person is less than that available on the ground.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-10/
See lessDuring heavy exercise, we get cramps in the legs due to the accumulation of
During heavy exercise, we get cramps in the legs due to the accumulation of (ii) lactic acid. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-10/
During heavy exercise, we get cramps in the legs due to the accumulation of (ii) lactic acid.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-10/
See lessDuring exhalation, the ribs
During exhalation, the ribs (ii) move downwards. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-10/
During exhalation, the ribs (ii) move downwards.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-10/
See lessNormal range of breathing rate per minute in an average adult person at rest is:
Normal range of breathing rate per minute in an average adult person at rest is (ii) 15–18. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-10/
Normal range of breathing rate per minute in an average adult person at rest is (ii) 15–18.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-10/
See lessIn cockroaches, air enters the body through
In cockroaches, air enters the body through (iii) spiracles. In cockroaches, air enters the body through (iii) spiracles.
In cockroaches, air enters the body through (iii) spiracles.
In cockroaches, air enters the body through (iii) spiracles.
See lessTake three test-tubes. Fill each 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?
Living organisms release CO2 during respiration whereas plant utilize CO2 for photosynthesis. So, the test tube A will have the highest concentration of carbon dioxide because the carbon dioxide as it comes only by respiration of snail. In test tubes B and C, a part of the carbon dioxide is utilizedRead more
Living organisms release CO2 during respiration whereas plant utilize CO2 for photosynthesis. So, the test tube A will have the highest concentration of carbon dioxide because the carbon dioxide as it comes only by respiration of snail. In test tubes B and C, a part of the carbon dioxide is utilized by the plant for photosynthesis and hence there is less concentration of carbon dioxide.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-10/
See lessWhy do we often sneeze when we inhale a lot of dust-laden air?
When dust particles enter our nostril, it triggers a message to the brain. The brain instructs the nasal chamber to initiate sneezing. This is a method to remove the unwanted dust particles from the nostrils. Sneezing is a type of defence mechanism used by our body. https://www.tiwariacademy.com/nceRead more
When dust particles enter our nostril, it triggers a message to the brain. The brain instructs the nasal chamber to initiate sneezing. This is a method to remove the unwanted dust particles from the nostrils. Sneezing is a type of defence mechanism used by our body.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-10/
See lessList the similarities and differences between aerobic and anaerobic respiration.
• Similarities: Food is oxidized in both cases and energy is released. • Differences: Carbon dioxide and water are the end products of aerobic respiration, while alcohol is the end product of anaerobic respiration. Aerobic respiration releases more energy than anaerobic respiration. https://www.tiwaRead more
• Similarities: Food is oxidized in both cases and energy is released.
• Differences: Carbon dioxide and water are the end products of aerobic respiration, while alcohol is the end product of anaerobic respiration. Aerobic respiration releases more energy than anaerobic respiration.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-10/
See lessWhy does an athlete breathe faster and deeper than usual after finishing the race?
When the athlete runs in the race, his body needs more energy. In order to get extra energy, the athlete breathes faster. Because more oxygen is supplied to our cells. It speeds up the breakdown of food and more energy is released. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapteRead more
When the athlete runs in the race, his body needs more energy. In order to get extra energy, the athlete breathes faster. Because more oxygen is supplied to our cells. It speeds up the breakdown of food and more energy is released.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-10/
See lessWhat would be the CBSE Exam 2020-2021 Date Sheet for Class 10 and 12?
start from May
start from May
See less