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Rosario Garcia
week 7 ch 20,21,22
| Question | Answer |
|---|---|
| COVERINGS OF THE BRAIN AND SPINAL CORD | Dura mater, Arachnoid mater, Pia mater |
| formation of CSF | forms by separation of fluid from blood in the choroid plexuses. is found in the subarachnoid space around the brain and spinal cord and within the cavities and canals of the brain and spinal cord. |
| CIRCULATION OF CSF | flows into the ventricles of the brain, circulates through the ventricles and into the central canal and subarachnoid spaces, and is then absorbed back into blood. |
| CSF amount at a time in plexuses | The amount of CSF in the average adult is about 140 ml (about 23 ml in the ventricles and 117 ml in the subarachnoid space of the brain and cord). But it is continually refreshed as new CSF is formed and older CSF is reabsorbed. |
| location of the four major pairs of plexuses and examples of nerves that emerge from each. | |
| what are choroid plexuses | networks of capillaries that project from the pia mater into the lateral ventricles and into the roofs of the third and fourth ventricles. |
| function of CSF | cushion of fluid both around the organs and within them;reservoir of circulating fluid that, along with blood, the brain monitors for changes in the internal enviroment like CO2 changes and ph |
| what is a manometer | a sensor attached to the needle to determine the pressure of the CSF within the subarachnoid space. |
| function of the spinal cord 1of 2 | 1.conduction paths to and from the Spinal cord (lumbar enlargement) Dura mater (cut) Conus medullaris brain. Ascending tracts conduct sensory impulses up the cord to the brain. Descending tracts conduct motor impulses down the cord from the brain. |
| function of the spinal cord 2of 2 | 2. integrator, or reflex center, for all spinal reflexes. (center of a refelx arc) |
| Reflex Arc | a signal conduction route to and from the CNS (the brain and spinal cord). |
| cauda equina | "horse tail" of spinal nerve roots at L1 the end of the spinal cord |
| major divisions of the brainstem and describe the functions of each. | |
| processes of brain development | |
| Spinal cord tracts provide conduction paths to and from the brain. The tracts that conduct sensory impulses down the cord | descending |
Created by:
rosybrisa17
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