Which information is incorrect about cardiac output ?

Options

A. It's average value is 5000 ml
B. The stroke volume multiplied by the heart rate, gives the cardiac
output.
C. It is the volume of blood pumped out by each ventricle per minute.
D. The body has no the ability to alter the cardiac output.

Answer

To determine which information is incorrect about cardiac output, we need to analyze each statement provided in the question.

### Step-by-Step Solution:

1. **Understanding Cardiac Output (CO)**:
- Cardiac output is defined as the volume of blood pumped by the heart per minute. It is an important physiological measurement.

2. **Evaluating the Options**:
- **Option 1**: "Its average value is 5000 ml."
- This is correct. The average cardiac output is approximately 5 liters per minute, which is equivalent to 5000 ml.

- **Option 2**: "Stroke volume multiplied by the heart rate gives the cardiac output."
- This is also correct. Cardiac output (CO) can be calculated using the formula: CO = Stroke Volume (SV) × Heart Rate (HR).

- **Option 3**: "It is the volume of blood pumped out of each ventricle per minute."
- This statement is true as well. Cardiac output refers to the total volume of blood pumped by both ventricles in one minute.

- **Option 4**: "The body has no ability to alter the cardiac output."
- This statement is incorrect. The body can indeed alter cardiac output based on various factors such as physical activity, stress, and overall metabolic demand.

3. **Conclusion**:
- The incorrect statement about cardiac output is: "The body has no ability to alter the cardiac output."