Muscle Information and Courses from MediaLab, Inc.
These are the MediaLab courses that cover Muscle and links to relevant pages within the course.
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| False Positive Results A false positive result for blood on the reagent strip can occur when oxidizing contaminants, such as hypochlorite (bleach), remain in collection bottles after cleaning. Contamination of the urine with provodine-iodine, a strong oxidizing agent, used in surgical procedures can result in a false positive reaction. Microbial peroxide found in association with urinary tract infections may also cause false-positive results. Capoten® (Captopril) can cause decreased reactivity. The muscle tissue form of hemoglobin, myoglobin is a well-known cause of false-positive reactions on the blood portion of the reagent strip. When tissue hemoglobin is present, the urine specimen has a clear red appearance. Patients suffering from muscle-wasting disorders or muscular destruction due to trauma, prolonged coma, or convulsions or individuals engaging in extensive exertion may have myoglobin in their urine. Specific tests for myoglobin, such as immunodiffusion techniques or protein electrophoresis, are needed to confirm the presence of this substance in a urine specimen. Levels of ascorbic acid normally found in urine do not interfere with this test. | View Page |
| Creatinine excretion correlates best with which of the following parameters: | View Page |
| Following a myocardial infarction which of the following enzymes will be the first to
become elevated: | View Page |
| Increases in the MB fraction of CK is associated with: | View Page |
| Increases in LD fractions 4 and 5 are indicative of: | View Page |
| Match the tissues on the left with the corresponding LDH isoenzyme peak on the right. | View Page |
| The following LDH Isoenzyme pattern would be seen in: | View Page |
| The following LDH Isoenzyme pattern would be seen in: | View Page |
| The following LDH Isoenzyme pattern would be seen in: | View Page |
| Label the scan with CK isoenzyme fractions: | View Page |
| Label the scan: | View Page |
| The following CK isoenzyme pattern would be seen in: | View Page |
| Gas gangrene may be seen in infections with all the following clostridia except: | View Page |
| Agent: Tularemia (bacterium) Most likely means of dissemination: Solid or aerosolPrimary route of entry: Inhalation, absorption, or ingestionGeneral signs and symptoms: Sudden fever, chills, headaches, muscle aches, joint pain, dry cough, progressive weakness, and pneumonia.The disease is not transmissible through human contact. When used as a WMD, infection would be acquired by handling infected material, eating or drinking contaminated food or water or by breathing in the bacterium. | View Page |
| Agent: Viral hemorrhagic fevers (Ebola, Marburg, Lassa and Argentine) Most likely means of dissemination: Solid, liquid or aerosolPrimary route of entry: Absorption, inhalation, ingestionGeneral signs and symptoms: Vary by type of viral hemorrhagic fever (VHF), but initial signs and symptoms often include marked fever, fatigue, dizziness, muscle aches, loss of strength, and exhaustion. Severe cases of VHF often show signs of bleeding under the skin, in internal organs, or from body orifices like the mouth, eyes, or ears. Photo courtesy of the CDC archives. | View Page |
| Causes of Work-related Musculoskeletal Disorders The primary goal of ergonomics is the prevention of musculoskeletal disorders (MSDs). There are many potential causes of MSDs. Injury can occur from a single event (strain, sprain, slip, or fall) or result from build-up of tissue damage from many small injuries. An MSD can develop over time if a motion is repeated consistently so that the constant trauma causes damage to a muscle, tendon, bone, or bursa of a joint. Force, vibration, or maintenance of an awkward position for a prolonged period of time can cause MSDs.Some specific causes of MSDs that are related to laboratory tasks are: Prolonged use of a keyboard or mouse Prolonged sitting at a microscope Pipetting Screwing and unscrewing vial caps Standing at a laboratory instrument for a prolonged period of time Lack of rest - intensive hours at the workstation with few breaks Sustained awkward position | View Page |
| The most common eye complication in patients with candidiasis is: | View Page |
| Which of the following identifies a major mechanism of electricity-induced injury? | View Page |
| Electricity-induced Injury The major mechanisms of electricity-induced injury include: Electrical energy causing direct tissue damage Conversion of electrical energy into thermal energy causing massive tissue destruction Direct trauma resulting from falls or violent muscle spasms | View Page |
| Which of the parasites listed here is/are transmitted via ingestion of contaminated pork? | View Page |
| This suspicious form was recovered in muscle tissue. | View Page |
| This parasite, found in striated muscle, is responsible for which of the following conditions? | View Page |
| Stool is the specimen of choice for the recovery of which of the following parasites? | View Page |
| Which of the following parasites lay live larvae? | View Page |
| Match each parasite listed here with its corresponding optimal specimen type from which it may be recovered: | View Page |
| A 29 year old male steak house owner from Arizona presented to his doctor complaining of weight loss, abdominal pain and diarrhea. Patient history revealed that the man eats all of his meals at his restaurant and his favorite meat is rare sirloin steak. The man also noted that he had recently been on anti-parasitic medication. The doctor ordered a stool for parasitic examination. These two suspicious forms were seen. The patient is most likely suffering from an infection with: | View Page |
| Which of the following parasites may be recovered in the peripheral blood? | View Page |
| In addition to sperm, other findings that may be noted on a wet prep include: | View Page |