nervous system

Question 1

CNS coordinating a response

Answer 1

1. stimulus
2. receptor
3. sensory neurone
4. CNS
5. motor neurone
6. effector (muscle/gland)
7. response

Question 2

relfex arc

Answer 2

1. stimulus
2. receptor
3. sensory neurone
4. relay neurone
5. motor neurone
6. effector (muscle/gland)
7. response

Question 3

neurone structure

Answer 3

• electrical impulses - passed along axon
• dendrites - branched endings to connect to many other neurones
• long to speed up impulse (connecting another neurone slows the process down)
• connects to another neurone via synapse - impulse triggers transmitter chemicals, diffuses along gap to next neurone, triggering impulse

Question 4

sensory neurone

Answer 4

• short axon
• long dendron
• cell body along axon

Question 5

motor neurone

Answer 5

• myelin (fatty) sheet surrounds axon
• cell body at beginning
• long axon