Biological Bases: CNS

Question 1

CNS Define

Answer 1

Is comprised of the brain and spinal cord, and acts as the brain’s processing center, gathering and synthesising sensory information and responding to it

Question 2

Main Functions

Answer 2

1. Gathering sensory information from external stimuli
2. Synthesising information
3. Responding to stimuli

Question 3

Components

Answer 3

• Brain

- Spinal Cord

Question 4

Brain

Answer 4

• Consists of cerebellum and cerebrum, which consists of two hemispheres and four lobes
• It is composed of millions of nerve cells that transmit electrical and chemical signals throughout the body

Question 5

Spinal Cord

Answer 5

• Runs from the brainstem and is a major thoroughfare for messages between the brain and the body
• Consists of 31 segments, each with sensory nerves leading into the dorsal (back) side and motor nerves exiting the ventral sides
• Contains white matter on the outside (myelinated neurons) and grey matter on the inside (unmyelinated neurons)