Final answer:
The statement that all neurotransmitters are pretty much the same in structure, just different receptors, is False.
Step-by-step explanation:
The statement that all neurotransmitters are pretty much the same in structure, just different receptors, is False.
Neurotransmitters are chemical messengers that transmit signals between neurons. They have different structures, and each neurotransmitter binds specifically to its own receptors, like a key fitting a lock. This specificity allows for precise communication between neurons.
For example, dopamine and noradrenaline are neurotransmitters that have different structures and interact with different receptors. So, while neurotransmitters may have some similarities in their function, they are not all the same in structure.