Podcast
Questions and Answers
Why does an athlete breathe faster and deeper than usual after finishing a race?
Why does an athlete breathe faster and deeper than usual after finishing a race?
- To prevent dehydration
- To supply more oxygen to the cells for energy production (correct)
- To cool down the body temperature
- To reduce the heart rate quickly
What is a similarity between aerobic and anaerobic respiration?
What is a similarity between aerobic and anaerobic respiration?
- Both processes occur in the absence of oxygen
- Both release energy by breaking down food (correct)
- Both produce only water as byproduct
- Neither process breaks down food molecules
Why do we often sneeze when inhaling a lot of dust-laden air?
Why do we often sneeze when inhaling a lot of dust-laden air?
- Due to the irritation caused by foreign particles in the nasal cavity (correct)
- To regulate the body temperature
- To increase the oxygen levels in the body
- To eliminate excess carbon dioxide
In which test-tube would there be the highest concentration of CO2?
In which test-tube would there be the highest concentration of CO2?
What happens when anaerobic respiration takes place in muscle cells during high energy demand?
What happens when anaerobic respiration takes place in muscle cells during high energy demand?
What is the primary purpose of placing a snail and a plant together in a test-tube?
What is the primary purpose of placing a snail and a plant together in a test-tube?
What is the primary reason why mountaineers carry oxygen with them?
What is the primary reason why mountaineers carry oxygen with them?
During exhalation, what do the ribs primarily do?
During exhalation, what do the ribs primarily do?
What causes cramps in the legs during heavy exercise?
What causes cramps in the legs during heavy exercise?
What are the tiny pores on the surface of a leaf called?
What are the tiny pores on the surface of a leaf called?
Which of the following is NOT a respiratory organ in humans?
Which of the following is NOT a respiratory organ in humans?
Study Notes
Athlete Breathing Post-Race
- Athletes experience faster and deeper breathing after a race due to the body's demand for oxygen to replenish energy and remove carbon dioxide buildup.
Similarity in Respiration
- Both aerobic and anaerobic respiration produce energy, although aerobic requires oxygen while anaerobic does not.
Sneezing and Dust
- Sneezing occurs in response to inhaling dust-laden air as a protective reflex to expel irritants and clear the respiratory tract.
Test-Tube CO2 Concentration
- The test-tube with the highest concentration of CO2 is typically where anaerobic respiration is occurring, such as in yeast or muscle cells.
Anaerobic Respiration in Muscles
- During high energy demand, anaerobic respiration in muscle cells leads to lactic acid production, which can contribute to fatigue and cramps.
Snail and Plant Test-Tube Purpose
- Placing a snail and a plant together in a test-tube allows for the study of gas exchange; plants produce oxygen through photosynthesis while snails respire and release CO2.
Oxygen for Mountaineers
- Mountaineers carry oxygen due to reduced atmospheric oxygen levels at high altitudes, which can lead to hypoxia and difficulty in breathing.
Ribs During Exhalation
- During exhalation, the ribs primarily move downward and inward, aiding in the reduction of lung volume and expelling air.
Cramps During Heavy Exercise
- Cramps in the legs during heavy exercise are often caused by lactic acid accumulation and muscle fatigue due to prolonged activity.
Pores on Leaf Surface
- The tiny pores on the surface of a leaf are called stomata, which facilitate gas exchange for photosynthesis and respiration.
Non-Respiratory Organ
- The heart is NOT a respiratory organ in humans, as it primarily circulates blood rather than facilitating gas exchange.
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Description
Test your understanding of Chapter 10 on Respiration in Animals and Plants from Class 7 Science NCERT book. Questions cover topics like why athletes breathe faster after a race, anaerobic respiration, and energy production in muscle cells.
