Question

Which chemicals pass across the synaptic gap and increase the possibility the next neuron in the chain will fire?

A) Hormones.
B) Neurotransmitters.
C) Enzymes.
D) Antibodies.

Answer 1

Neurotransmitters are the chemicals that pass across the synaptic gap and increase the possibility of the next neuron firing.

Step-by-step explanation:

The correct answer is B) Neurotransmitters. Neurotransmitters are chemicals that pass across the synaptic gap and increase the possibility of the next neuron firing. They are released by the presynaptic neuron's axon terminal into the synapse, where they bind to receptors on the postsynaptic neuron's membrane. This binding allows the nerve impulse to travel through the receiving neuron.

For example, acetylcholine, epinephrine, serotonin, and GABA are neurotransmitters that can either excite or inhibit the postsynaptic neuron, increasing or decreasing the likelihood of an action potential being generated.