structure/ function of neurons

Question 1

types of neurons

Answer 1

-sensory
-relay
-motor

Question 2

structure of neuron

Answer 2

• less than mm to m long
  -cell body includes nucleus
  -dendrites carry out impulses
  -axon carries impulses from cell body and is covered by fatty layer of myelin sheath which protects and speeds up electrical transmission
  -myelin sheath is divided by nodes of Ranvier which forces impulse to jump across gaps
  -terminal axons are at the end to communicate with next neuron

Question 3

electric transmission

Answer 3

IF in:
resting state-
-ve charged compared to outside
activated by stimulus-
+ve charged causing action potential to occur, creating electrical impulse