Question

Which of the following is not true of a chemical synapse?

• A. Signals can move in either direction across the synapse
• B. Neurotransmitter molecules are removed from the synaptic deft after they bind with receptor molecules
• C. A minimum number of neurotransmitter.receptor complexes must form before the impulse is propagated in the posetsnaptic neuron
• D. Neurotransmitter secreted is not the same for all synapses

Answer 1

The correct option is A Signals can move in either direction across the synapse

Neurotransmitters are molecules that fit like a lock and key into a specific receptor. The receptor is located on the next cell in the line. So, you can see, nerve impulses cannot travel in the opposite direction, because nerve cells only have neurotransmitter storage vesicles going one way, and receptors in one place.

So, the correct answer is 'Signals can move in either direction across the synapse'.