*Question G0A01:
What is one way that RF energy can affect human body tissue?*  

*Correct Answer is  A: It heats body tissue*  

### AI Response: (may contain errors)  

RF energy can affect human body tissue primarily through heating. This is due to the absorption of RF energy by the body's tissues, which causes the molecules to vibrate and generate heat. This is similar to how a microwave oven heats food.

### Explanation:

1. **Correct Answer: A - It heats body tissue**
   - RF energy is non-ionizing radiation, meaning it does not have enough energy to remove tightly bound electrons from atoms or molecules. Instead, it causes molecules, particularly water molecules in the body, to vibrate, which generates heat. This is the primary way RF energy affects human tissue.

2. **Why the other choices are incorrect:**
   - **B: It causes radiation poisoning**
     - Radiation poisoning is typically associated with ionizing radiation, such as X-rays or gamma rays, which can damage DNA and cells. RF energy is non-ionizing and does not cause radiation poisoning.
   - **C: It causes the blood count to reach a dangerously low level**
     - RF energy does not affect blood cell production or count. This effect is not associated with RF exposure.
   - **D: It cools body tissue**
     - RF energy does not cool tissue; it heats it. Cooling would require a different mechanism, such as the removal of heat, which RF energy does not provide.

### Useful Rule of Thumb:

- **Specific Absorption Rate (SAR):** This is a measure of the rate at which the body absorbs RF energy. It is expressed in watts per kilogram (W/kg). Regulatory bodies set limits on SAR to ensure safety and prevent excessive heating of body tissues.

Understanding these concepts will help you recognize the effects of RF energy on human tissue and the importance of adhering to safety guidelines to prevent excessive exposure.