How many values are correctly given from following?
i. Normal heartbeet rate = 72 beats/min.
ii. Period of cardiac cycle = 0.8 sec.
iii. Stroke volume = 70 ml
iv. Normal cardiac output = 5000 ml
v. Normal blood pressure = 120/80 mm Hg

Options

A. Three
B. Four
C. Five
D. None

Answer

To determine how many values are correctly given in the question, we will analyze each statement one by one.

1. **Normal heartbeat rate = 72 beats/min**:
- The normal resting heart rate for adults is indeed around 72 beats per minute.
- **Conclusion**: This statement is correct.

2. **Period of cardiac cycle = 0.8 sec**:
- The cardiac cycle duration can be calculated by taking the reciprocal of the heart rate. If the heart rate is 72 beats/min, the period of one cardiac cycle is 60 seconds / 72 beats = 0.833 seconds, which rounds to approximately 0.8 seconds.
- **Conclusion**: This statement is correct.

3. **Stroke volume = 70 ml**:
- The average stroke volume for a healthy adult is typically around 70 ml per beat.
- **Conclusion**: This statement is correct.

4. **Normal cardiac output = 5000 ml**:
- Cardiac output (CO) is calculated as stroke volume (SV) multiplied by heart rate (HR). With a stroke volume of 70 ml and a heart rate of 72 beats/min, the cardiac output would be 70 ml/beat * 72 beats/min = 5040 ml/min, which is approximately 5000 ml/min.
- **Conclusion**: This statement is correct.

5. **Normal blood pressure = 120/80 mm Hg**:
- The normal blood pressure for adults is often cited as 120/80 mm Hg, where 120 is the systolic pressure and 80 is the diastolic pressure.
- **Conclusion**: This statement is correct.

Now, let's summarize the results:
- All five statements are correct.

**Final Answer**: 5 values are correctly given.