Question

Chemical messengers that cross the synaptic gaps between neurons; when released by the sending neuron, they travel across the synapse and bind to receptor sites on the receiving neuron, thereby influencing whether that neuron will generate a neural impulse.

A. Neurons

B. Neurotransmitters

C. Synapses

D. Hormones

Answer 1

Neurotransmitters are chemical messengers that travel from one neuron to another across the synapse, influencing the activity of the receiving neuron.

Step-by-step explanation:

The chemical messengers that cross the synaptic gaps between neurons are known as neurotransmitters. These substances are released by a neuron (the presynaptic neuron) when a nerve impulse reaches its axon terminal. The neurotransmitters then travel across the synapse, bind to receptor sites on the receiving neuron (the postsynaptic neuron), and influence whether that neuron will generate a neural impulse. This process is critical for neurons to communicate with each other and to transmit signals throughout the nervous system. Neurotransmitters can be excitatory or inhibitory, and are essential for regulating a myriad of physiological processes. Common examples include acetylcholine, dopamine, serotonin, and epinephrine.