Question

In the following diagram showing axon terminal and synapse, A, B, C, D and E represents

• A. axon terminal, synaptic cleft, synaptic vesicle, neurotransmitters and receptor respectively
• B. axon terminal, synaptic vesicle, synaptic cleft, receptor and neurotransmitters respectively
• C. synaptic cleft, synaptic vesicle, axon terminal, neurotransmitters and receptor respectively
• D. synaptic cleft, axon terminal, synaptic vesicle, neurotransmitters and receptor respectively

Answer 1

The correct option is B axon terminal, synaptic vesicle, synaptic cleft, receptor and neurotransmitters respectively


A neuron is the structural and functional unit of the neural system. In the given diagram:

• A represents the axon terminal which refers to a group of branches present at the end of the axon.
• B represents the synaptic vesicle. Numerous vesicles are present in the cytoplasm of the synaptic knob containing neurotransmitters inside.
• C represents the synaptic cleft which is the gap present between postsynaptic membrane of a neuron and the presynaptic membrane of the succeeding neuron. It is the space where the neurotransmitters are released.
• D represents the receptor present on the postsynaptic membrane. There are a number of receptors present on the postsynaptic membrane onto which the neurotansmitters bind for signal transmission.
• E represents neurotransmitters which are the chemical substances present in synaptic vesicles and responsible for the transmission of impulse across the synapse.