What happens during synaptic transmission?

• A. A message is carried by a neurotransmitter across a synapse
• B. A neuron forms a new action potential
• C. A cell divides to create new neurons
• D. A neuron becomes inactive

Answer: (A)

During synaptic transmission, the primary process involves the release of neurotransmitters from the presynaptic neuron into the synaptic cleft, where they then bind to receptors on the postsynaptic neuron. This communication allows for the transfer of a signal from one neuron to another, enabling various functions such as muscle contraction, thought processes, and emotional regulation. The neurotransmitter acts as the messenger that carries the information across the synapse, effectively facilitating communication between neurons.

While the formation of a new action potential occurs in response to sufficient stimulation of the postsynaptic neuron, it is a subsequent step rather than a defining feature of synaptic transmission itself. Cell division to create new neurons pertains to neurogenesis, which occurs in different contexts than synaptic events. Lastly, a neuron becoming inactive doesn't represent synaptic transmission, as the focus of this process is on active communication rather than inactivity. Understanding this critical role of neurotransmitters in synaptic transmission is fundamental in biological psychology.