Question

question 38 neurotransmitters are molecules that travel across the a threshold. b synaptic gap. c cell body. d myelin sheath.

Explanation:

Neurotransmitters are chemical messengers that cross the synaptic gap between neurons to transmit signals. They are not related to the threshold (activation - level in neuron), cell body (main part of neuron), or myelin sheath (insulating layer around axon).

Answer:

B. synaptic gap