CNS, ANS, Somatic, and Integrated Functions

During extreme conditions stroke caused by decreased

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: cerebral cortex on same side of brain Commissural fibers: connect same cortical regions on two sides of brain (Corpus callosum: primary location of commissural fibers) The association fibers: important for enabling communication between the different areas of the brain integration Blood Supply to the CNS: CNS comprises 2% of body weight (3- 4 pounds) Receives 15% of blood supply High metabolic rate Brain uses 20% of oxygen consumed by body at rest Brain uses 50% of glucose consumed by body at rest Depends on blood flow for energy CNS High demand for blood Depends on aerobic glycolysis Requires glucose and oxygen No glycogen stores Fatty acid not used for energy Ketones used mainly during extreme conditions Stroke: Caused by decreased blood supply, either Occlusion of cerebral blood vessel Hemorrhage from cerebral blood vessel In typical capillaries, there are pores or fenestrations. These arent’t normally big enough to get proteins out, but solutes In the brain, the astrocytes form tight junction (not occludins like in other cells) This means that hydrophilic and hydrophobic solutes ca...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online