Topic 14 Flashcards

Front

What is the role of the nervous system?

Back

to coordinate and regulate body functions in response to changes in the environment

Front

True or False?

Information passes along neurones in the form of electrical impulses.

Back

True.

Front

Which two components make up the central nervous system (CNS)?

Back

• brain

• spinal cord

Front

What does the peripheral nervous system (PNS) consist of?

Back

the nerves outside of the brain and spinal cord

Front

What is the neurone type shown in the image?

Back

sensory neurone
(the position of the cell body in the middle)

Front

What is the neurone type shown in the image?

Back

relay neurone
(short and have a small cell body at one end with many dendrites)

Front

What is the neurone type shown in the image?

Back

motor neurone

(long axon with a large cell body at one end)

Front

True or False?

The nerve impulse travels toward the cell body in all neurone cells.

Back

False.

A nerve impulse travels towards the cell body in sensory neurones and away from the cell body in motor and relay neurones.

Front

What are reflex actions?

Back

automatic, rapid responses to a stimulus that do not involve conscious thought

Front

Write a flow diagram to represent a reflex arc.

Back

stimulus → receptor → sensory neurone → relay neurone → motor neurone → effector → response