Central Nervous System (CNS)

Question 1

What does the brain contain?

Answer 1

Approximately 100 billion neurons, forming circuits which enable transmission of information. Supporting glial cells can also make up the brain.

Question 2

What are some functions of the brain?

Answer 2

Many, including attention, concentration, memory, language, executive function. Also receives, processes, and sends information to/from the PNS via the spinal cord.

Question 3

What is the spinal cord?

Answer 3

It is a cable like column of nerves that runs from the base of the neck to the lower back, encased within 26 vertebrae.

Question 4

What is the functions of the spinal cord?

Answer 4

It transmits sensory information from the PNS to the brain. Transmits nerve signals from the brain to the PNS (motor information). It also provides rapid reflexive responses independently of the brain.