PLZZ answer Reflexes may be coordinated by the brain or by the spinal cord.

In reflexes co-ordinated by the brain, there are no relay neurones.

Suggest why there is a difference in the mean speed of the impulse for the two reflexes.

1

Different types of neurones work together in a reflex action.

This creates an automatic, and rapid response to a stimulus, which protects the body from potentially harmful conditions, such as touching something hot.

A reflex action follows this general sequence and does not involve the conscious part of the brain, which makes it much quicker.

The nerve pathway followed by a reflex action is called a reflex arc. For example, a simple reflex arc happens if we accidentally touch something hot.

Nerves are problay the number 1 thing in the body