**Answer:** To transmit electrical and chemical signals in the nervous system.
2. **Question:** Name the three main parts of a neuron.
**Answer:** Cell body (soma), dendrites, and axon.
3. **Question:** What is the role of the myelin sheath?
**Answer:** To insulate axons and increase the speed of electrical signal transmission.
4. **Question:** Which part of the brain is responsible for coordinating movement?
**Answer:** The cerebellum.
5. **Question:** What is the function of the frontal lobe?
**Answer:** It is involved in decision-making, problem-solving, and voluntary movement.
6. **Question:** Define synaptic transmission.
**Answer:** The process by which neurons communicate with each other through the release of
neurotransmitters at synapses.
7. **Question:** What are the two divisions of the nervous system?
**Answer:** The central nervous system (CNS) and the peripheral nervous system (PNS).
8. **Question:** What is the blood-brain barrier, and why is it important?
**Answer:** A selective barrier that prevents harmful substances in the blood from entering the
brain, protecting neural tissue.
9. **Question:** Which neurotransmitter is associated with reward and pleasure?
, **Answer:** Dopamine.
10. **Question:** What is the function of the hippocampus?
**Answer:** It plays a key role in memory formation and spatial navigation.
11. **Question:** What is the difference between gray matter and white matter?
**Answer:** Gray matter consists of neuron cell bodies, while white matter consists of myelinated
axons.
12. **Question:** What is the role of the cerebellum?
**Answer:** It coordinates voluntary movements, balance, and posture.
13. **Question:** What is an action potential?
**Answer:** A rapid electrical signal that travels along the axon of a neuron.
14. **Question:** Name the four lobes of the brain.
**Answer:** Frontal, parietal, temporal, and occipital lobes.
15. **Question:** What is the function of the thalamus?
**Answer:** It acts as a relay station for sensory information to the cerebral cortex.
16. **Question:** What is the autonomic nervous system responsible for?
**Answer:** Regulating involuntary bodily functions like heart rate, digestion, and respiration.
17. **Question:** What is the difference between the sympathetic and parasympathetic nervous
systems?
**Answer:** The sympathetic nervous system activates the "fight or flight" response, while the
parasympathetic nervous system promotes "rest and digest" activities.