Nervous Information and Courses from MediaLab, Inc.
These are the MediaLab courses that cover Nervous and links to relevant pages within the course.
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| Which of the following are functions of CSF? | View Page |
| Three Main Functions of CSF Cerebrospinal fluid has three main functions:CSF protects brain and spinal cord from trauma.CSF supplies nutrients to nervous system tissue.CSF removes waste products from cerebral metabolism.
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| Blast Cells Blast cells may be seen in the spinal fluid when cell proliferation in acute leukemia or lymphoma spreads to the central nervous system. The arrows indicate the two blasts in this field. Notice the smooth chromatin pattern in the nucleus and prominent nucleoli in both cells. Notice that an Auer rod is present in the cytoplasm in the blast to the right. The Auer rod indicates that these blasts are myeloblasts rather than lymphoblasts. A segmented neutrophil and several red cells can also be seen. | View Page |
| Clinical Significance cont'd Conditions in which glucose levels in the urine are above 100 mg/dL and detectable include:diabetes mellitus and other endocrine disordersimpaired tubular reabsorption due to advanced kidney diseasepregnancy - glycosuria developing in the 3rd trimester may be due to latent diabetes mellituscentral nervous system damagepancreatic diseasedisturbances of metabolism such as, burns, infection or fractures | View Page |
| Which one of the following statements about lead poisoning is false: | View Page |
| Other Causes of Ketonuria Ketonuria can also be found in conditions associated with a decreased intake of carbohydrates (starvation), digestive disturbances, dietary imbalance (high fat/low carbohydrate diet), eclampsia, prolonged vomiting and diarrhea, glycogen storage diseases, vigorous exercise, fever, and following administration of anesthesia. Ketone bodies are mildly toxic to the body, tending to interfere with the excretion of uric acid, produce mild depression of the central nervous system, and cause acidosis. | View Page |
| A clinical condition often associated with Streptococcus milleri (anginosus) is: | View Page |
| Review 1 Piscitelli SC., Shwed J., Schreckenberger P., Danziger LH.
Streptococcus milleri group: renewed interest in an elusive pathogen.
European Journal of Clinical Microbiology & Infectious Diseases.11:491-8, 1992The following review examines the bacteriological characteristics, epidemiology, pathogenicity and antimicrobial susceptibility of the "Streptococcus milleri group". "Streptococcus milleri group" is a term for a large group of streptococci which includes Streptococcus intermedius, Streptococcus constellatus and Streptococcus anginosus.Usually considered commensals, these organisms are often associated with various pyogenic infections including cardiac, intra-abdominal, subcutaneous and central nervous system infections, particularly with the formation of abscesses.Organisms of the "Streptococcus milleri group" are often unrecognized pathogens due to the lack of uniformity in classifications and difficulties in microbiological identification. Penicillin G, cephalosporins, clindamycin and vancomycin all possess activity against these streptococci.Use of agents with poor activity may promote infections with "Streptococcus milleri group" and allow it to exhibit its pathogenicity. An understanding of these organisms may aid in their recognition and proper treatment. | View Page |
| The epidural and subdural abscesses in the two patients reported by Gelfand, et al, are clinical manifestations uncommon for S. milleri. | View Page |
| Match the complications that are most likely to be associated with each of the two yeast diseases that are listed in the drop-down box: | View Page |
| Other Factors Affecting Drug Absorption and Distribution In addition to protein availability, other factors may affect drug absorption and distribution in the body as a whole or at specific sites within the body. The following table highlights some of these other factors. Factor Discussion Regional blood flow Reduced area blood flow can be seen in diabetics and enhanced blood flow can be seen in tumors. Lipid solubility of the drug The more lipophilic a drug is, the more likely it will enter the central nervous system. The integrity of the GI tract In a diseased gut, an orally-administered drug may not be absorbed as expected. Age Drug kinetics and dispositions change throughout life. In general, metabolism of drugs is reduced in the elderly. Genetics Mutations or deletions in drug metabolizing enzymes can greatly affect a drug's disposition. | View Page |
| TDM for Anticonvulsants Anticonvulsants typically have narrow therapeutic windows. When levels are too low, the risk for seizure remains present. Drug levels that are too high can depress the central nervous system and may even lead to coma. Examples of anticonvulsants that are monitored by TDM include: Carbamazepine (Tegretol) Valproic acid (Depakene) Phenytoin (Dilantin) Phenobarbital Primidone (Mysoline) | View Page |