- General Anatomy of Central Nervous System , 9.1 page 216 - The CNS consists of what? Glial Cells - 75-90% of the CNS is made up of what cells? - Which of the 4 types of glial cells is most abundant? Astrocytes - Astrocytes form a structural and functional link between neurons and what? - Astrocytes direct the development of what? - Astrocytes, in their maintenance of the normal extracellular environment surrounding neurons, play an especially important role in maintaining normal extracellular levels of what? - Astrocytes function in conjunction with what other glial cells to do what? Microglia - What is the function of microglia and how do they perform it? Physical Support of the Central Nervous System - What are the two outermost structures that protect the soft tissues of the CNS? - What is between the bone and the nervous tissue? - What are the 3 meningeal membranes? - What is a subdural hematoma? - What fills the subarachnoid space? - Cerebrospinal fluid (CSF) is similar in composition to what? - CSF fill what cavities within the brain? - What are the epithelial cells that line the ventricles and central canal? - What is the choroid plexus and what is its function? - How does CSF enter the subarachnoid space and how is it eventually reabsorbed? - What are the roles of CSF in the brain? Blood Supply to the Central Nervous System - Although the CNS accounts for only some 2% of body weight, it receives almost what percentage of blood? - Why is this large blood supply necessary? - The brain uses what % of all oxygen the body consumes and what % of glucose? - What is a stroke? - Why are cells in the CNS particularly sensitive to interruptions in blood flow? - Besides glucose as the primary energy source for cells in the CNS, under certain conditions what other molecule can be used to supply as much as 2/3 of the energy needs? The Blood-Brain Barrier - Exchange of materials between tissues and the blood occurs in what blood vessel? - How do hydrophobic molecules, hydrophilic molecules, and cells and macromolecules move in relation to endothelial cells? - What is transcytosis? - Where does transcytosis not occur? - What is the blood-brain barrier, and its existence is due to what?
You've reached the end of your free preview.
Want to read all 5 pages?
- Fall '08
- Integrated CNS Function