Harry is going to Mei's house to feed Mei's cat while she is gone.Mei left Harry her key ring,but when Harry reaches the front door,he realizes he doesn't know which key fits the lock.He tries several before finding the right one.If we compare the key and the lock to the behaviour of communicating neurons,we can say that the key is like a __________________ and the lock is like a ________________________.
A) vesicle;synaptic space
B) neurotransmitter;receptor site
C) presynaptic neuron;vesicle
D) neurotransmitter;node of Ranvier

Question

Quizplus · Accepted Answer

The key, like a neurotransmitter, carries a message (in this case, the signal to unlock the door), and the lock, like a receptor site, receives that message and allows the door to be opened. None of the other options accurately reflect the relationship between a key and a lock.

Harry Is Going to Mei's House to Feed Mei's Cat