Question

Saltatory conduction 

A. Occurs only in myelinated fibres. 

B. Does not depend on depolarization of the nerve membrane. 

C. Has a slower velocity in cold than in warm conditions. 

D. Is faster than non-saltatory conduction in nerve fibres with diameters around 10 μm. 

E. Transmits impulses with a velocity proportional to fibre diameter. 

Answer 1

A. True Excitation leaps from node to node across the myelinated segments. 

B. False The membrane does depolarize at the nodes. 

C. True Cooling slows sodium conductance at the nodes. 

D. True Theoretically, saltatory conduction becomes the slower in nerve fibres with diameters less than 1 μm. 

E. True And to the distance between nodes.