Which one of the following statement is correct?

Options

A. Endocrine glands regulate neural activity but not vice versa
B. Neurons regulate endocarine activity,but not vice versa
C. Endocrine glands regulate neural activity ,and nervous system regulates endocrine activity
D. Neither hormones control neural activity nor the neurons control endocrine activity

Answer

To determine which statement is correct regarding the relationship between the endocrine system and the nervous system, we will analyze each of the four statements provided.

### Step-by-Step Solution:

1. **Understanding the Statements**:
- The first statement claims that "Endocrine glands regulate neural activity but not vice versa."
- The second statement claims that "Neurons regulate endocrine activity but not vice versa."
- The third statement claims that "Endocrine glands regulate neural activity and the nervous system regulates endocrine activity."
- The fourth statement claims that "Neither hormones control neural activity nor the neurons control endocrine activity."

2. **Analyzing the First Statement**:
- This statement suggests a one-way regulation where endocrine glands control neural activity. However, this is not entirely accurate as the nervous system also influences endocrine functions.

3. **Analyzing the Second Statement**:
- This statement implies that neurons have a unilateral control over endocrine activity. This is also misleading because the endocrine system can influence neural activity.

4. **Analyzing the Third Statement**:
- This statement indicates a bidirectional relationship where both endocrine glands and the nervous system regulate each other. This aligns with the concept of the neuroendocrine system, where the hypothalamus (part of the nervous system) controls the pituitary gland (an endocrine gland), which in turn regulates other endocrine glands.

5. **Analyzing the Fourth Statement**:
- This statement denies any interaction between hormones and neural activity, which is incorrect as there is a significant interaction between the two systems.

6. **Conclusion**:
- After analyzing all statements, the third statement is the most accurate. It reflects the interdependent relationship between the endocrine and nervous systems, where endocrine glands regulate neural activity and the nervous system regulates endocrine activity.

### Final Answer:
The correct statement is: **Endocrine glands regulate neural activity and the nervous system regulates endocrine activity.**

---