In the simplified diagram below depicting exocytosis of synaptic vesicles, which components (A to D) correspond to each of the following? Your answer would be a four-letter string composed of letters A to D only, e.g. DBCA.

( ) Ca²⁺
( ) Complexin
( ) Synaptotagmin
( ) SNARE complex

Question

In the simplified diagram below depicting exocytosis of synaptic vesicles, which components (A to D) correspond to each of the following? Your answer would be a four-letter string composed of letters A to D only, e.g. DBCA.

( ) Ca²⁺
( ) Complexin
( ) Synaptotagmin
( ) SNARE complex

Quizplus · Accepted Answer

C
B
D
 Calcium binds to synaptotagmin and activates the protein, which then displaces complexin to relieve the block that complexin places on the metastable SNARE complexes; this release leads to membrane fusion.

In the Simplified Diagram Below Depicting Exocytosis of Synaptic Vesicles