Unit 2

Question 1

Neurons

Answer 1

Specialized cells that transmit electrical signals

Question 2

Neurotransmitters

Answer 2

Chemical messengers (e.g., dopamine, serotonin) that influence mood and behavior.

Question 3

Neuroplasticity

Answer 3

Brain’s ability to reorganize itself, especially after injury.

Question 4

Brain’s Communication Networks

Answer 4

Central nervous system (CNS) includes the brain and spinal cord, while the peripheral nervous system (PNS) connects the CNS to the rest of the body.

Question 5

Brain Methods

Answer 5

Brain imaging (fMRI, PET scans) allows researchers to study brain activity.