Question at position 28 Match the following area with the correct term: Contains vesicles filled with acetylcholine Myosin heads Axon terminal Synaptic cleft Sarcolemma of neuromuscular junction匹配题
A
Myosin heads
B
Axon terminal
C
Synaptic cleft
D
Sarcolemma of neuromuscular junction

Question

Question at position 28 Match the following area with the correct term: Contains vesicles filled with acetylcholine Myosin heads Axon terminal Synaptic cleft Sarcolemma of neuromuscular junction

BlackTom AI · Accepted Answer

The prompt asks to match each area with its correct term in the neuromuscular junction context.
Option 1: Myosin heads. These are part of the thick filaments inside the muscle fiber that interact with actin during contraction; they do not contain acetylcholine or vesicles, so this is not the correct match for vesicle-filled areas.
Option 2: Axon terminal. This is the structure at the distal end of the motor neuron axon where synaptic vesicles filled with the neurotransmitter acetylcholine are stored. It is the site that releases acetylcholine into the synaptic cleft to communicate with muscle fibers.
Option 3: Synaptic cleft. The synaptic cleft is the extracellular gap between the axon terminal and the muscle cell membrane. It is the space across which acetylcholine diffuses, not the place where vesicles are stored.
Option 4: Sarcolemma of neuromuscular junction. This refers to the muscle cell’s sarcolemma specifically at the NMJ region, i.e., the membrane that receives the signal, not the vesicle-containing region.
Therefore, the area containing vesicles filled with acetylcholine corresponds to the axon terminal, while the other options describe different components of the NMJ or muscle structure.

Question at position 28 Match the following area with the correct term: Contains vesicles filled with acetylcholine Myosin heads Axon terminal Synaptic cleft Sarcolemma of neuromuscular junction匹配题

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