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The quantity 1100-1200mL in the respirat...

The quantity 1100-1200mL in the respiratory volumes of a normal human adult refers to

A

maximum air that can be breathed in and breathed out

B

residual volume

C

expiratory reserve volume

D

Total lung capacity minus residual volume

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The correct Answer is:
To answer the question regarding the respiratory volume of a normal human adult that refers to the quantity of 1100-1200 mL, we can analyze the options provided step by step. ### Step-by-Step Solution: 1. **Understanding Respiratory Volumes**: - The human respiratory system has various volumes, including tidal volume, residual volume, expiratory reserve volume, and total lung capacity. 2. **Option Analysis**: - **Option 1: Maximum air that can be breathed out and breathed in**: - This is known as tidal volume, which is approximately 500 mL per breath. Given the respiratory rate, this does not match the 1100-1200 mL range. - **Conclusion**: This option is incorrect. - **Option 2: Residual Volume**: - Residual volume is the amount of air that remains in the lungs after the most forceful expiration. This volume is approximately 1100-1200 mL, which matches the quantity given in the question. - **Conclusion**: This option is correct. - **Option 3: Expiratory Reserve Volume (ERV)**: - The expiratory reserve volume is the amount of air that can be forcibly exhaled after a normal expiration. This volume is approximately 1100 mL, which is slightly less than the residual volume. - **Conclusion**: This option is incorrect. - **Option 4: Total Lung Capacity minus Residual Volume**: - Total lung capacity includes vital capacity plus residual volume. The statement that it is total lung capacity minus residual volume is incorrect because it does not accurately represent the components of lung capacity. - **Conclusion**: This option is incorrect. 3. **Final Conclusion**: - The quantity of 1100-1200 mL in the respiratory volumes of a normal human adult refers to the **Residual Volume**.
To answer the question regarding the respiratory volume of a normal human adult that refers to the quantity of 1100-1200 mL, we can analyze the options provided step by step. ### Step-by-Step Solution: 1. **Understanding Respiratory Volumes**: - The human respiratory system has various volumes, including tidal volume, residual volume, expiratory reserve volume, and total lung capacity. 2. **Option Analysis**: ...
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