1. what does the central nervous system consist of ?
2. what happens to neurons that die ?
3. what does a motor neuron do ?
4. what is a reflex  action ?
5. how are messages relayed to and from the nervous system ?
6. what class of substance does thyroxin belong to ?
7. where is the pituitary gland found ?  
8. what is a synapse ?
9. what does an axon do ?
10.what kind of neuron transmits messages from pain receptors to the central nervous system ?
11.what  chemicals does the exocrine system manufacture ?
12.what is a target cell ?
13.what does the cerebellum do ?
14.what hormone controls blood sugar level ?
15.what kind of neuron has both its axons and dendrites in the brain or spinal cord ?
16.where are the erector papillary muscles found ?
17.in which syndrome are neurotransmitters thought to be the  cause of involuntary actions ?
18.what does a myelin sheath do ?
19.what part of the brain control thinking ?
20.brain dissections can reveal information about what ?
  THANK YOU A LOT FOR HELP