introduction

Question 1

what are the divisions of the PNS?

Answer 1

somatic nervous system - skin, joints, muscles (voluntary)

autonomic nervous system - internal organs, blood vessels, glands (involuntary)

Question 2

what is the role of the cerebrospinal fluid in the ventricular system?

Answer 2

• provides physical protection
• maintains appropriate levels of ions

Question 3

what are the subdivisions of the spinal cord?

Answer 3

• cervical (cervical enlargement for arms)
• thoracic
• lumbar (lumbosacral enlargement for legs)
• sacral

Question 4

what makes up grey matter?

Answer 4

cell bodies of neurons and glia

Question 5

what makes up white matter?

Answer 5

neuronal axons wrapped in myelin