Describe the role of sensory neurones.(2)....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(Total for question = 3 marks)Edexcel Biology GCSE - The Nervous System

Sensory neurons, also known as afferent neurons, play a crucial role in the nervous system.

1. Sensory Input: Their primary function is to collect information from sensory organs (like the skin, eyes, ears, tongue, and nose) and internal organs. This information can be about various stimuli such as light, sound, heat, pressure, and chemical changes.

2. Transmit Information: After collecting this information, sensory neurons transmit it to the central nervous system (the brain and spinal cord). They do this through electrical signals known as nerve impulses.

In summary, sensory neurons act as messengers, carrying information about the environment or the body's internal state to the brain and spinal cord, where it can be processed and interpreted.