Explanation:
The Fc portion of the immunoglobulin molecule is responsible for activating the complement. When antibodies bind to their target antigen, the Fc portion can activate the classical complement pathway, leading to the formation of a membrane attack complex (MAC) that can lyse the target cell. This is an important mechanism of the immune system for eliminating pathogens and other foreign substances from the body. In contrast, the heavy chains, light chains, hinge regions, and Fab portions of the immunoglobulin molecule are involved in antigen binding and specificity and do not activate complement.
Explanation:
The lipid result that would be expected to be falsely elevated on a serum specimen from a non-fasting patient is triglycerides.
As mentioned in the question, triglyceride levels in the blood can vary significantly depending on the recent intake of food, especially foods high in fat. This is because triglycerides are a type of fat that is synthesized in the liver from dietary fats and carbohydrates and are transported to adipose tissue for storage.
Explanation:
Proper hand hygiene: Healthcare workers should clean their hands before and after caring for each patient, and patients and visitors should also practice good hand hygiene.
Explanation:
Laboratories performing both moderately complex and highly complex tests need to be enrolled in a CLIA-approved proficiency testing program. This includes clinical diagnostic testing, as well as testing in other areas such as blood banking, cytology, histology, and pathology. The CLIA (Clinical Laboratory Improvement Amendments) program requires laboratories to participate in a proficiency testing program to ensure the accuracy and reliability of their testing, regardless of the complexity of the tests being performed.
Explanation:
Fusarium species is the most likely to be the cause of mycotic keratitis (fungal eye infection).
Mycotic keratitis is a serious eye infection that can result from exposure to fungal spores or other microorganisms. The infection can cause corneal damage and lead to vision loss if left untreated.
Fusarium species are commonly associated with mycotic keratitis and are a frequent cause of fungal eye infections in tropical and subtropical regions. Other common fungal pathogens associated with mycotic keratitis include Aspergillus, Candida, and Curvularia species.
Explanation:
To convert Celsius to Fahrenheit, you can use the formula:
°F = (°C × 9/5) + 32
So for 20 degrees Celsius:
°F = (20 × 9/5) + 32
°F = (36) + 32
°F = 68
Therefore, 20 degrees Celsius is equal to 68 degrees Fahrenheit.
Explanation:
As magnification decreases, the opening of the iris diaphragm should be decreased. This is because as the magnification decreases, the field of view becomes wider and the amount of light reaching the specimen increases. Closing the iris diaphragm reduces the amount of light entering the microscope and can help improve the contrast and clarity of the image. Conversely, as the magnification increases, the opening of the iris diaphragm should be increased to allow more light to reach the specimen and prevent the image from becoming too dark.
