What is the primary function of sensory nerves?

The primary function of sensory nerves is to gather information from the environment and send it to the brain. These nerves are responsible for detecting stimuli, such as touch, temperature, pain, and specific sensory modalities like sound and light. Once they receive these signals, sensory nerves transmit the information to the central nervous system, where the brain processes it, leading to sensations that help in responding to various environmental changes. This process is fundamental to perception, allowing individuals to interpret the world around them and respond appropriately.

In contrast, the other options refer to functions associated with different systems. While some nerves transmit signals to muscles, the focus of sensory nerves is on gathering information rather than transmitting motor commands. The control of involuntary body functions is primarily managed by the autonomic nervous system, separate from the sensory nerves' functions. Lastly, generating electrical impulses for communication is a general characteristic of all nerve cells, but it does not specifically describe the unique role of sensory nerves in the context of environmental interaction and information transfer to the brain.