Cooordination and response (2)

A boy accidentally touches a very hot object and immediately takes his hand away.

In this reflex action, what is the effector?

• a heat receptor in his hand

• a motor neurone

• a muscle in his arm

• the spinal cord

The diagram shows structures in a reflex arc. What is X?

• effector

• relay neuron

• sensory neurone

• synapse

Hormones and the nervous system both control our bodies. Hormones and the nervous system both control our bodies.

Which statement about the control provided by our hormones is correct?

• fast response and long lasting

• fast response and short lived

• slow response and long lasting

• slow response and short lived

The diagram shows a reflex arc.

Which label points to the sensory neurone?

• A

• B

• C

• D

What does the central nervous system consist of?

• brain, spinal cord and peripheral nerves

• brain and spinal cord only

• brain only

• spinal cord and peripheral nerves only