Question

Refer to the given figure which shows the axon terminal and synapse with their parts marked as 1 to 7. Identify the correct parts whose constitution forms the structure of the synapse.

A.1,2.3
B.3,4,5
C.4,5,6
D.5,6,7

Answer 1

Hint:
Neurons communicate with each other at junctions which are known as synapses. Electrical and chemical synapses are two types of synapses. The electrical synapse communicates with the help of a chemical messenger while in the electrical synapse ions flow directly between cells.

Complete answer:
Pre-synaptic membrane, synaptic cleft, and post-synaptic membrane constitute the structure of a synapse. The terminal button of an axon constitutes the presynaptic membrane. The synaptic cleft is the space between the pre-synaptic membrane and the post-synaptic membrane. The segment of the cell body or dendrites constitutes the post-synaptic membrane.
A neuron conveys information to a specific neuron of another cell with the help of a synapse. The signal is either chemical or electrical. Synapses play an important role in neuronal function. The presynaptic neuron plasma membrane comes close in contact with the membrane of the postsynaptic cell at a synapse. The extensive arrays of the molecular machinery that are present in both the sites of presynaptic and postsynaptic, link the two membranes together and cany out the signaling process.
The correct answer for the given question is 4,5,6 (pre-synaptic membrane, synaptic cleft, and post-synaptic membrane).

Option ‘C’ is correct

Note:
The synaptic vesicles are present inside the axon terminals that contain neurotransmitters. They get attached to the pre-synaptic membrane and release the neurotransmitter in the synaptic cleft.