Which part of the nervous system is the first to work when joshue feels a raindrop fall on his arm? brain spinal cord sensory neuron motor neuron

The right answer is the sensory neuron.

The sensory neuron, or sensory neuron, is a neuron located in a sensory ganglion that plays a role in the perception of a stimulus. Sensory neurons are often referred to as "afferent fibers". For example, a sensory neuron can be used for the perception of heat, or contact with an object.

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