neurons

Question 1

neuron

Answer 1

nerve cells that process and transmit messages through electrical and chemical signals

Question 2

dendrites

Answer 2

branch like structures at end of axo/ from cell body that carries messages to/from other neurons

Question 3

axon

Answer 3

carries impulses away from cell body down length of neurons. coated in layer of myelin sheath

Question 4

axon terminals

Answer 4

end of axon, messages reaches terminal button + crosses synapse to next neuron

Question 5

nodes of ranvier

Answer 5

gaps in myelin sheath which speeds up transmission

Question 6

myelin sheath

Answer 6

like a fatty insulating cell that protects axon and speeds up electrical transmission

Question 7

nucleus

Answer 7

contains genetic material of cell

Question 8

cell body

Answer 8

protects nucleus

Question 9

reflex neuron

Answer 9

• voluntary actions action that brain control
• planned actions
• involuntary (reflex actions) dont need pass through brain
• automatic + very quick
• mainly used for protection
• involuntary controlled by reflex ar

Question 10

process of 3 neurons working together

Answer 10

1. stimulus detected by sense organ in PNS conveys message to sensory
2. message reaches relay in CNS + sends to brain
3. transfers message to motor then to effector eg muscle/gland
4. response