ABCTE Biology Practice Exam 2026 - Free ABCTE Biology Practice Questions and Study Guide

The type of neuron that transmits impulses to the central nervous system is the sensory neuron. Sensory neurons play a crucial role in the nervous system by carrying signals from sensory receptors to the brain and spinal cord. These neurons are activated by stimuli such as light, sound, touch, and chemical changes, converting these external signals into electrical impulses that can be interpreted by the central nervous system.

This process is essential for the body to respond appropriately to environmental changes. For instance, when you touch something hot, sensory neurons send the signal to the spinal cord and brain, enabling a quick reaction to remove your hand from danger. Understanding the function of sensory neurons emphasizes their importance in our interactions with the world around us and the body's ability to maintain homeostasis.