Orthodromic conduction is -

Ans. is 'a' i.e., An axon can conduct impulse in one direction only o Experimentally, an axon can conduct impulse in either directionQ.o When an action potential is initiated in the middle of the axon, the impulse shall travel in both direction, i.e., one along the axon towards its terminal knobs and one in opposite direction, i.e., along the axon towards the cell body (soma) & dendrites.o However, in the intact body, i.e., in the natural situation, the impulses are conducted in the one direction onlyQ, i.e., from synaptic junction or receptors along axons to their termination.o Such conduction is called orthodromic conductionQ.o Conduction in opposite direction is called antidromic conduction, i.e., opposite to physiological direction.o However, antidromic conduction is very rare and may be seen only in muscle tissue.o In nerve fibers, the propagation of action potential is unidirectional (orthodromic) because transmission across neuromuscular junction and synpses is unidirectionalQ.