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Which one of the following statement is correct?
- a)Chest expands because air enters into the lungs
- b)Air enters into the lungs because chest expands
- c)The muscles of the diaphragm contracts because air enters into the lungs
- d)All of the above statements are correct
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Which one of the following statement is correct?a)Chest expands becaus...
Inhalation or inspiration is an active process.
we ,with the help of the intercoastal muscles, increase the volume of thoracic cavity ,thus increasing the volume of lungs. This creates a negative pressure inside the lungs as compared to external surrounding and therefore due to negative pressure, air comes inside the lungs.
we ,with the help of the intercoastal muscles, increase the volume of thoracic cavity ,thus increasing the volume of lungs. This creates a negative pressure inside the lungs as compared to external surrounding and therefore due to negative pressure, air comes inside the lungs.
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Which one of the following statement is correct?a)Chest expands becaus...
Explanation:
The correct statement is option B: "Air enters into the lungs because chest expands."
Reasoning:
Breathing is a process that involves the movement of air in and out of the lungs. It is facilitated by the expansion and contraction of the chest cavity, which creates changes in air pressure that allow for inhalation and exhalation.
1. Chest Expansion and Air Entry:
- When we breathe in, the muscles between the ribs (intercostal muscles) and the diaphragm contract.
- The contraction of the intercostal muscles causes the ribs to move upward and outward, expanding the chest cavity.
- Simultaneously, the diaphragm contracts and moves downward, further increasing the volume of the chest cavity.
- This expansion of the chest cavity creates a low-pressure environment inside the lungs.
- Due to this pressure difference, air from the surroundings moves into the lungs through the airways (trachea, bronchi, and bronchioles) to equalize the pressure.
2. Air Entry and Chest Expansion Relationship:
- The movement of air into the lungs is a direct result of the expansion of the chest cavity.
- As the chest expands, it creates a negative pressure gradient inside the lungs, causing air to rush in.
- Conversely, if the chest does not expand, there will be no change in the pressure gradient, and air will not enter the lungs in a normal breathing process.
Conclusion:
Option B is the correct statement because the expansion of the chest cavity leads to a decrease in pressure inside the lungs, causing air to enter. The other options mentioned in the question are not accurate representations of the cause and effect relationship involved in the process of breathing.
The correct statement is option B: "Air enters into the lungs because chest expands."
Reasoning:
Breathing is a process that involves the movement of air in and out of the lungs. It is facilitated by the expansion and contraction of the chest cavity, which creates changes in air pressure that allow for inhalation and exhalation.
1. Chest Expansion and Air Entry:
- When we breathe in, the muscles between the ribs (intercostal muscles) and the diaphragm contract.
- The contraction of the intercostal muscles causes the ribs to move upward and outward, expanding the chest cavity.
- Simultaneously, the diaphragm contracts and moves downward, further increasing the volume of the chest cavity.
- This expansion of the chest cavity creates a low-pressure environment inside the lungs.
- Due to this pressure difference, air from the surroundings moves into the lungs through the airways (trachea, bronchi, and bronchioles) to equalize the pressure.
2. Air Entry and Chest Expansion Relationship:
- The movement of air into the lungs is a direct result of the expansion of the chest cavity.
- As the chest expands, it creates a negative pressure gradient inside the lungs, causing air to rush in.
- Conversely, if the chest does not expand, there will be no change in the pressure gradient, and air will not enter the lungs in a normal breathing process.
Conclusion:
Option B is the correct statement because the expansion of the chest cavity leads to a decrease in pressure inside the lungs, causing air to enter. The other options mentioned in the question are not accurate representations of the cause and effect relationship involved in the process of breathing.
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