Place the following events in the correct order.
1) ACh is released into the synaptic cleft.
2) Synaptic vesicles fuse with the plasma membrane.
3) A muscle action potential is triggered.
4) An action potential arrives at the synaptic end bulb.
5) ACh binds to receptors on the motor end plate.
A) 2, 4, 5, 1, 3
B) 4, 3, 1, 2, 5
C) 1, 2, 4, 3, 5
D) 4, 2, 1, 5, 3

Question

Place the following events in the correct order. 
1) ACh is released into the synaptic cleft.
2) Synaptic vesicles fuse with the plasma membrane.
3) A muscle action potential is triggered.
4) An action potential arrives at the synaptic end bulb.
5) ACh binds to receptors on the motor end plate.
A) 2, 4, 5, 1, 3
B) 4, 3, 1, 2, 5
C) 1, 2, 4, 3, 5
D) 4, 2, 1, 5, 3

Quizplus · Accepted Answer

The correct sequence starts with an action potential arriving at the synaptic end bulb (4), causing synaptic vesicles to fuse with the plasma membrane (2). This leads to the release of acetylcholine (ACh) into the synaptic cleft (1), which then binds to receptors on the motor end plate (5), ultimately triggering a muscle action potential (3).

Place the Following Events in the Correct Order