Card Set Information
thebrain CNS nerves biom2020
intro; ventricular system
Draw a shape of a neuron, include: dendrites, axon, axon hillock, terminal boutons and cell body
look up google/slides
what are the types of neurons? draw them out.
- multipolar neuron
- bipolar neuron
- pseudo-unipolar neurone
Where are multipolar neurons found?
throughout the motor part of the nervous sytem
where are bipolar and pseudo-unipolar neurone found?
ganglia next to the spinal cord
Where are oligodendrocytes and schwann cells found?
How are they different?
What are their functions?
- CNS (o) and PNS (s)
- oligodendrocytes can wrap multiple neurons at once
- insulation, speed up conduction (saltatory conduction), use plasma membrane (lipid) to insulate
Draw a myelinated and unmylinated neuron
What are the matters of CNS and what are they made up of?
Gray matter: largely cell bodies and unmyelinated axons
White matter: largely myelinated axon of neurons
How much does the brain weigh?
around 1.4 kg
How much neural tissue of the body does it hold?
around c. 98%
What is the volume of the brain?
between 750-2100 cc
(1200 is typical)
What are the 4 ventricles that make up the ventricular system?
lateral ventricle (2)
What cells make up the ventricles?
The cells of the ependyma line
What is the septum pellucidum?
thin, medial partition
separates the 2 lateral ventricles
Where is the 3rd ventricle?
in the diencephalon
What is the interventricular foramen?
A structure that allows each lateral ventricle to communicate with 3rd ventricle
what is the cerebral aqueduct?
what is its function?
A slender canal in the midbrain
Connects the 3rd ventricle to the 4th ventricle
Draw out the diagram of the ventricular system
What are the ventricles filled with?