Biology

The correct answer is: B.They allow electrical signals to pass between neurons.

Explanation:

Neurotransmitters are chemical messengers used in the nervous system of animals to transmit signals across synapses between neurons or between neurons and other types of cells (like muscle cells). When an electrical signal reaches the end of a neuron, neurotransmitters are released into the synapse, where they bind to receptors on the adjacent cell, either continuing or modulating the signal.

The other options are incorrect because:

A.They transmit signals between immune cells: ...