Any nerve cell that conducts a signal towards the spinal cord or brain is called a:

• A. Interneuron
• B. Sensory neuron
• C. Motor neuron
• D. Glial cell

Answer: (B)

Verified step by step guidance

1. Step 1: Understand the role of different types of nerve cells. Sensory neurons are responsible for transmitting signals from sensory receptors (e.g., skin, eyes, ears) toward the central nervous system (spinal cord and brain). Motor neurons transmit signals from the central nervous system to muscles or glands, while interneurons connect neurons within the central nervous system. Glial cells provide support and protection for neurons but do not conduct signals.
2. Step 2: Identify the key phrase in the question: 'conducts a signal towards the spinal cord or brain.' This indicates the function of transmitting sensory information from the body to the central nervous system.
3. Step 3: Eliminate incorrect options based on their functions. Interneurons are involved in processing and relaying signals within the central nervous system, not conducting signals toward it. Motor neurons transmit signals away from the central nervous system to effectors. Glial cells do not conduct signals.
4. Step 4: Focus on the correct option, sensory neurons, which are specialized for detecting stimuli and sending signals toward the spinal cord or brain.
5. Step 5: Conclude that the correct answer is 'Sensory neuron,' as it matches the description provided in the question.