Question

Special cells in the body are responsible for gathering information about the body's environment. These cells are called receptor cells. The information gathered by receptor cells is encoded as electrical signals that travel along the body's nerve cells. The brain and spinal cord then process the electrical signals to determine how the body should respond.

Suppose information gathered by a group of receptor cells has just been processed by the nervous system. Which of the following could happen next?

The information could be stored as a memory.
The information could trigger an immediate behavior.
The information could be sent back to the receptor cells.

Answer 1

All three.

- Stored as a memory: sensory information can be encoded into short‑term or long‑term memory (e.g., remembering a sound or face).
- Trigger an immediate behavior: processing can produce reflexes or voluntary actions (e.g., pulling your hand away from something hot).
- Sent back to receptor cells: the nervous system has efferent pathways that modulate receptor sensitivity or activity (e.g., gamma motor neurons adjust muscle spindle sensitivity, olivocochlear fibers modulate cochlear hair cells).