Question

which of the following are true of neurotransmitters? all neurons are capable of receiving messages from any type of neurotransmitter a neurotransmitter must fit precisely into a receptor site to make chemical communication possible. each kind of neurotransmitter has a distinctive configuration that allows it to fit into a specific type of receptor site. there are several types of neurotransmitters.

Explanation:

• For "All neurons are capable of receiving messages from any type of neurotransmitter": Neurons have specific receptor sites, so not all neurons can receive any neurotransmitter. This is false.
• For "A neurotransmitter must fit precisely into a receptor site to make chemical communication possible": This is true as the lock - and - key model (analogy) applies here; the neurotransmitter needs to fit the receptor site for communication.
• For "Each kind of neurotransmitter has a distinctive configuration that allows it to fit into a specific type of receptor site": True, as different neurotransmitters have unique structures to match specific receptor sites.
• For "There are several types of neurotransmitters": True, examples include dopamine, serotonin, acetylcholine etc.

Answer:

B. A neurotransmitter must fit precisely into a receptor site to make chemical communication possible.
C. Each kind of neurotransmitter has a distinctive configuration that allows it to fit into a specific type of receptor site.
D. There are several types of neurotransmitters.