Lecture 19: The Central Nervous System Flashcards
What is gray matter made up of?
Soma, Dendrites, Unmeymlinated Axons
What is white matter made up of?
Myelinated axons
What is the outermost layer of protection for the brain?
Cranium
What is the outermost layer of protection for the spinal cord?
Vetebrae
What is the intermediate layer of protection for the brain?
Meninges
Epidural Space, Dura mater, Arachnoid membrane, Pia Mater
What is the inner layer of protection for the brain?
Extracellular Fluid
ISF: Within Pia Mater, CSF: Ventricles and subarachnoid space
How does ESF protect the brain?
Buoyancy, Impact absorption, Chemical protection
Why are capillaries in the brain highly selective?
Tight Junctions
Which two brain blood vessels do not have blood-brain barrier?
Hypothalamus, Medulla Oblongata
What percentage of blood from the heart go to the brain?
15%
What percentage of oxygen in the body go to the brain?
20%
What is the only thing that the brain “eats”?
Glucose
What are the four regions of the spinal cord?
Cervical, thoracic, lumbar, sacral