Question

The given diagram shows the axon terminal and synapse with a few parts labelled as A, B, C & D. Choose the correct combination of labelling from the given options.

• A. A- Synaptic vesicle, B- Axon terminal, C- Synaptic cleft, D- Postsynaptic membrane
• B. A- Axon terminal, B- Synaptic vesicle, C- Postsynaptic membrane, D- Synaptic cleft
• C. A- Synaptic vesicle, B- Synaptic cleft, C- Axon terminal, D- Post synaptic membrane
• D. A- Post synaptic membrane, B- Axon terminal, C- Synaptic vesicle, D- Synaptic cleft
  

Answer 1

The correct option is A A- Synaptic vesicle, B- Axon terminal, C- Synaptic cleft, D- Postsynaptic membrane

Synapses are usually formed between nerve terminals—axon terminals—on the sending neuron and the cell body or dendrites of the receiving neuron.
Inside the axon terminal of a sending cell are many synaptic vesicles. These are membrane-bound spheres filled with neurotransmitter molecules. There is a small gap between the axon terminal of the presynaptic neuron and the membrane of the postsynaptic cell, and this gap is called the synaptic cleft.

So in the given figure of axon terminal and synapse, the correct labelling of A, B, C and D are respectively synaptic vesicles, axon terminal, synaptic cleft and postsynaptic membrane.