In after cutting through the dorsal root of a spinal nerve of a mammal, an associated receptor in the skin were simulated, the animal would

Options

A. Show no response
B. Show a normal but slow response
C. Still be able to feel the stimulation
D. Respond but only at a different level of spinal cord

Answer

To solve the question regarding the effects of cutting through the dorsal root of a spinal nerve in a mammal when associated receptors in the skin are stimulated, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Spinal Nerves**:
- Spinal nerves are mixed nerves that contain both sensory and motor fibers. They arise from the spinal cord and are responsible for transmitting signals between the body and the central nervous system.

2. **Identifying the Dorsal Root**:
- The dorsal root of a spinal nerve is primarily responsible for carrying sensory information from the body to the spinal cord. It contains sensory neurons that relay signals from receptors in the skin and other tissues.

3. **Consequences of Cutting the Dorsal Root**:
- When the dorsal root is cut, the sensory neurons are disrupted. This means that any sensory information (such as touch, pain, or temperature) from the skin will not be transmitted to the spinal cord.

4. **Stimulation of Skin Receptors**:
- If the associated receptors in the skin are stimulated after the dorsal root has been cut, the signals generated by these receptors will not reach the spinal cord due to the severed sensory pathway.

5. **Expected Response of the Animal**:
- Since the sensory information cannot reach the central nervous system, the animal will show no response to the stimulation of the skin receptors. The sensory input is essential for generating a response, and without it, the animal cannot perceive the stimulus.

6. **Conclusion**:
- Therefore, the correct answer to the question is that the animal would show no response to the stimulation of the skin receptors after the dorsal root of the spinal nerve has been cut.

### Final Answer:
The animal would show no response.