What is the maximum number of action potential generated by SAN?

Options

A. 70-75/min
B. 40-60/min
C. 14-16/min
D. 25-30/min

Answer

To determine the maximum number of action potentials generated by the Sinoatrial Node (SAN), we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Heart Structure**:
- The heart consists of four chambers: the right atrium, right ventricle, left atrium, and left ventricle. The SAN is located in the upper right corner of the right atrium.

2. **Role of the Sinoatrial Node (SAN)**:
- The SAN is known as the natural pacemaker of the heart. It generates electrical impulses that initiate heartbeats, controlling the heart's rhythm.

3. **Action Potential Generation**:
- The SAN can generate a maximum number of action potentials, which is crucial for the heart's rhythmic contractions. Each action potential corresponds to one heartbeat.

4. **Determining the Maximum Rate**:
- According to the information provided, the SAN generates action potentials at a rate of 70 to 75 per minute. This means that the heart beats approximately 70 to 75 times in one minute due to the impulses from the SAN.

5. **Conclusion**:
- Therefore, the maximum number of action potentials generated by the SAN is 70 to 75 per minute.

### Final Answer:
The maximum number of action potentials generated by the SAN is **70 to 75 per minute** (Option 1).

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