The sac-like structures that are found at the end of a neuron's axon and that contain neurotransmitters are called

• A. synaptic vesicles.
• B. axon terminals.
• C. synaptic knobs.
• D. dendrites.

Answer: (A)

Verified step by step guidance

1. Understand the structure of a neuron: Neurons are the basic building blocks of the nervous system, consisting of a cell body, dendrites, and an axon.
2. Identify the function of the axon: The axon is a long, slender projection that conducts electrical impulses away from the neuron's cell body.
3. Learn about the axon terminal: At the end of the axon, there are axon terminals, which are responsible for transmitting signals to other neurons.
4. Explore the role of synaptic vesicles: Synaptic vesicles are sac-like structures located within the axon terminals. They store neurotransmitters, which are chemicals that transmit signals across a synapse to another neuron.
5. Differentiate between the options: Recognize that synaptic vesicles are specifically found in the axon terminals, and they are not the same as dendrites or synaptic knobs, which have different roles in neuron function.