In which of the following, action potential flows as a wave?
a) saltatory impulse
b) continuous impulse
c) both a and b
d) none of these
Explanation Continuous nerve impulse conduction occurs in non-myelinated axons. The action potential travels along the entire length of the axon. Hence, more time is taken in generating and then transmitting nerve impulses during an action potential.
Which of the following in myelinated neuron fiber is impermeable to K+ and Na+ ion?
a) plasma membrane
b) cytoplasm
c) myelin sheath
d) Nodes of Ranvier
Explanation myelin sheath prevent ionic exchange and depolarization fiber along the whole length of neuron
In myelinated nerve fibers, where does the ionic exchange and depolarization occur?
a) plasma membrane
b) cytoplasm
c) myelin sheath
d) Nodes of Ranvier
Explanation so the action potential is conducted from node to node in jumping manner.
The nerve impulse in which action potential is conducted from node to node in jumping manner is called…….
a) saltatory impulse
b) continuous impulse
c) both a and b
d) none of these
What is the average speed of nerve impulse in meter per second?
a) 10-20
b) 50-80
c) 100-120
d) 300-400
Explanation speed of nerve impulse is different in different neurons
Which of the following is correct about speed of nerve impulse?
a) thicker the nerve fiber- less resistance to flow of current, faster the nerve impulse
b) thicker the nerve fiber- less resistance to flow of current, slower the nerve impulse
c) thinner the nerve fiber- less resistance to flow of current, slower the nerve impulse
d) none of these
