The Nervous System, Part 1

What does the nervous system control?

• Only psychological reactions

• Only physiological reactions

• Only the endocrine system

• Everything including organs, physiological, and psychological reactions

What are the two main parts of the nervous system?

• The heart and the brain

• The sensory and motor systems

• The central and peripheral nervous systems

• The brain and the spinal cord

What role do glial cells play in the nervous system?

• They are involved in creating and circulating cerebrospinal fluid among other functions

• They play no significant role

• They only provide physical support to neurons

• They only insulate neurons

What is the function of the myelin sheath?

• To insulate axons and speed up the transmission of nerve impulses

• To provide nutrients to neurons

• To connect neurons together

• To slow down the transmission of nerve impulses

How do neurons communicate with each other?

• Using both chemistry and electricity

• Through sound waves

• Using only chemical signals

• Through physical contact only