Venom of Cobra affects

Options

A. Respiratory system
B. Nervous system
C. Circulatory system
D. Digestive system

Answer

### Step-by-Step Solution:

1. **Understanding Cobra Venom**: The venom of the cobra is primarily composed of proteins, which are toxic in nature. It is important to recognize that this venom acts as an antigen when it enters the body.

2. **Immune Response**: When the venom is introduced into the body, it triggers an immune response. However, the potency of the venom is such that it can lead to severe consequences before the immune system can effectively respond.

3. **Target System**: The primary system affected by cobra venom is the nervous system. This is crucial to note, as the venom specifically targets this system first.

4. **Neurotoxin Identification**: The type of toxin present in cobra venom is classified as a neurotoxin. Neurotoxins are substances that disrupt the normal function of the nervous system.

5. **Specific Toxin**: The specific neurotoxin found in cobra venom is called "harrytoxin." This toxin is responsible for the various symptoms that occur after a cobra bite.

6. **Symptoms of Envenomation**: The symptoms caused by the neurotoxin include:
- Severe pain at the site of the bite
- Blurred vision
- Dizziness or vertigo
- Drowsiness
- Paralysis
- Potentially leading to death if not treated promptly

7. **Mechanism of Action**: The venom inhibits the transmission of nerve impulses. This disruption in impulse transmission leads to the failure of the nervous system, which can result in the collapse of other systems, such as the respiratory and circulatory systems.

8. **Conclusion**: Therefore, the correct answer to the question is that the venom of the cobra primarily affects the nervous system.