CAIE A-Level Biology A2 15.1.7 Rapid Transmission in Myelinated Neurone Questions

any four from:

differences

myelinated neurone

1 faster (impulse transmission) ;
ora

explanation

2 myelin (sheath), insulates (the axon)/ prevents movement of ions ;

3 nodes of Ranvier / gaps with no myelin sheath, have voltage-gated channels

or

nodes of Ranvier / gaps with no myelin sheath, allow movement of ions ;

4 depolarisation / action potential, occurs only at nodes of Ranvier / gaps with no myelin sheath;
ora

5 action potentials jump from node to node / saltatory conduction ;
ora

6 longer local circuits / local circuits occur between nodes ;
ora