Question

structure of a typical synapse
identify the synapse structure labeled g

• axon terminals
• presynaptic membrane
• synaptic vesicles
• synaptic cleft

Explanation:

To identify the structure labeled G in a synapse:

1. Recall synapse structure: The presynaptic membrane is the part of the axon terminal membrane facing the synaptic cleft.
2. Analyze options:

• Axon terminals (A - related, not G).
• Presynaptic membrane: Matches G's position (membrane of the presynaptic neuron's terminal).
• Synaptic vesicles (D - small vesicles, not G).
• Synaptic cleft (H - the gap, not G).

So G is the presynaptic membrane.

Answer:

B. presynaptic membrane