Answer the following questions in relation to the human breathing system - Leaving Cert Biology - Question (b) - 2014
Question (b)
Answer the following questions in relation to the human breathing system.
(i) When we breathe we inhale air. What gas in the air is essential for respiration?
(ii)... show full transcript
Worked Solution & Example Answer:Answer the following questions in relation to the human breathing system - Leaving Cert Biology - Question (b) - 2014
Step 1
(i) When we breathe we inhale air. What gas in the air is essential for respiration?
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Answer
The gas that is essential for respiration when we inhale air is oxygen.
Step 2
(ii) One large muscle and one set of muscles are involved in inhalation. Name both.
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Answer
The large muscle involved in inhalation is the diaphragm. The set of muscles involved is the intercostal (rib) muscles.
Step 3
(iii) Describe in detail how we inhale air.
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Inhalation begins when the intercostal muscles contract, causing the ribcage to move up and out. Simultaneously, the diaphragm contracts and moves downward. This expansion of the ribcage and downward movement of the diaphragm increases the volume of the lungs.
As a result, the pressure inside the lungs decreases compared to the atmospheric pressure. This pressure difference causes air to flow into the lungs, filling them with oxygen that is essential for respiration.
Step 4
(iv) Name one disorder of the human breathing system.
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One disorder of the human breathing system is asthma.
Step 5
1. Suggest a possible cause of the disorder.
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A possible cause of asthma can be allergic reactions to dust, pollen, or pet dander.
Step 6
2. Suggest a treatment for the disorder.
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A common treatment for asthma includes the use of inhalers that contain bronchodilators to relieve and manage symptoms.
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