Question 8 of 16intermediate🔧 ApplyShort Answer2 marks

Paridhi and Anusha of Grade 7 started running for their morning workout. After they completed their running, they counted their breaths per minute. Anusha was breathing faster than Paridhi. Provide at least two possible explanations for why Anusha was breathing faster than Paridhi.

Correct Answer

Two possible explanations for why Anusha was breathing faster than Paridhi:

First, Anusha may have lower stamina or fitness level compared to Paridhi, so her body required more oxygen during and after running. This led to faster breathing to meet the increased energy demands.

Second, Anusha may have run faster or exerted herself more than Paridhi, requiring her body to produce more energy through respiration. This process needs more oxygen and produces more carbon dioxide, resulting in faster breathing to exchange these gases more quickly.

Exercise: Let Us Enhance Our Learning | Q: 8 | (Page Page 15)
For More Understanding

Explanation

The chapter explains that during physical activity like running, the body needs more energy. Respiration uses oxygen to break down glucose and release energy. When we exercise, our muscles need more oxygen and produce more carbon dioxide. This causes us to breathe faster to bring in more oxygen and remove more carbon dioxide. Different individuals may have different fitness levels, and the intensity of exercise can vary, leading to different breathing rates.

Solution Steps

  1. During physical activity like running, the body needs more energy, which is produced through respiration using oxygen to break down glucose

  2. Anusha may have lower stamina or fitness level than Paridhi, causing her body to require more oxygen and breathe faster to meet energy demands

  3. Anusha may have run faster or exerted herself more, requiring more oxygen and producing more carbon dioxide, leading to faster breathing for gas exchange

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