NEET BIOLOGY

Detailed explanation-1: -Unidirectional transmission of a nerve impulse through nerve fibre is due to the fact that neurotransmitters are released by the axon endings and not by dendrites.

Detailed explanation-2: -At most chemical synapses, information flow is unidirectional and involves the conversion of an electrical signal to a chemical signal in the presynaptic neuron, and then to an electrical signal in the postsynaptic neuron.

Detailed explanation-3: -Solution : Unidirectional transmission of nerve impulse is maintained by synapses.

Detailed explanation-4: -Synapses are unidirectional as they can only transmit information in one direction, from the presynaptic neuron to the postsynaptic neuron, due to the presence of neurotransmitter receptors on the postsynaptic neuron.

Detailed explanation-5: -Synaptic transmission is the process at synapses by which a chemical signal (a transmitter) is released from one neuron and diffuses to other neurons or target cells where it generates a signal which excites, inhibits or modulates cellular activity.