Neurotransmitters are

Neurotransmitters are

• A. Chemical Messengers
• B. Electrical Currents
• C. Ions
• D. Hormones

Answer: (A)

Neurotransmitters are chemical messengers that neurons use to communicate at synapses. When an action potential reaches the presynaptic terminal, it triggers the release of these molecules into the synaptic cleft. They diffuse across the gap and bind to receptors on the postsynaptic neuron, regulating ion channels or signaling pathways to produce excitatory or inhibitory postsynaptic potentials. This chemical signaling is distinct from electrical currents, which are the actual impulses traveling along axons, and from ions, which are just charged particles involved in generating membrane potentials. Hormones, while also signaling chemicals, travel through the bloodstream to act on distant targets rather than providing fast, localized synaptic communication. So neurotransmitters are chemical messengers.

Neurotransmitters are chemical messengers that neurons use to communicate at synapses. When an action potential reaches the presynaptic terminal, it triggers the release of these molecules into the synaptic cleft. They diffuse across the gap and bind to receptors on the postsynaptic neuron, regulating ion channels or signaling pathways to produce excitatory or inhibitory postsynaptic potentials. This chemical signaling is distinct from electrical currents, which are the actual impulses traveling along axons, and from ions, which are just charged particles involved in generating membrane potentials. Hormones, while also signaling chemicals, travel through the bloodstream to act on distant targets rather than providing fast, localized synaptic communication. So neurotransmitters are chemical messengers.