Choose the incorrect match in the following.

Options

A. Inspiratory capacity = IRV + TV
B. Functional residual capacity = RV + ERV
C. Total lung capacity = VC - TV
D. Vital capacity = ERV + TV + IRV

Answer

To solve the question "Choose the incorrect match in the following," we need to analyze the definitions of the different lung capacities provided in the options. Here’s a step-by-step breakdown:

### Step 1: Understand Inspiratory Capacity
- **Definition**: Inspiratory capacity (IC) is the maximum volume of air that can be inhaled after a normal expiration.
- **Components**: It includes the tidal volume (TV) and inspiratory reserve volume (IRV).
- **Conclusion**: This match is correct.

### Step 2: Understand Functional Residual Capacity
- **Definition**: Functional residual capacity (FRC) is the volume of air remaining in the lungs after a normal expiration.
- **Components**: It includes the expiratory reserve volume (ERV) and residual volume (RV).
- **Conclusion**: This match is correct.

### Step 3: Understand Total Lung Capacity
- **Definition**: Total lung capacity (TLC) is the total volume of air that the lungs can hold at the end of a forceful inspiration.
- **Components**: It includes residual volume (RV), expiratory reserve volume (ERV), tidal volume (TV), and inspiratory reserve volume (IRV).
- **Conclusion**: The statement given in the question about TLC being equal to vital capacity (VC) plus residual volume (RV) is correct. However, the way it is described might lead to confusion regarding the components.

### Step 4: Understand Vital Capacity
- **Definition**: Vital capacity (VC) is the maximum volume of air that can be exhaled after a maximum inhalation.
- **Components**: It includes the expiratory reserve volume (ERV), tidal volume (TV), and inspiratory reserve volume (IRV).
- **Conclusion**: This match is correct.

### Step 5: Identify the Incorrect Match
- After analyzing all the definitions and components, the incorrect match is found in the description of Total Lung Capacity. The way it is presented may lead to misunderstanding, as it does not clearly state that TLC is equal to VC plus RV, which can be misleading.

### Final Answer
The incorrect match is **Total Lung Capacity** as described in the options.

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