noun, plural: organelles. A membrane-bound compartment or structure in a cell that performs a special function. Supplement. A eukaryotic cell contains many organelles, for example, the nucleus, endoplasmic reticulum, golgi apparatus, mitochondria, and chloroplast (plastid).However, not all these organelles are found in only one cell or in an organism. The chloroplast, for instance, is abundant in plant cells but not in animal cells.upplement. A eukaryotic cell contains many organelles, for example, the nucleus, endoplasmic reticulum, golgi apparatus, mitochondria, and chloroplast (plastid). However, not all these organelles are found in only one cell or in an organism.
Definition. An ANA test detects antinuclear antibodies (ANA) in your blood. Your immune system normally makes antibodies to help you fight infection.n ANA test detects antinuclear antibodies (ANA) in your blood. Your immune system normally makes antibodies to help you fight infection.
1 About 95% of those with SLE have a positive ANA test result. 2  If someone also has symptoms of SLE, such as arthritis, a rash, and skin sensitivity to light, then the person probably has SLE. 3  A positive anti-dsDNA and anti-SM (often ordered as part of an ENA panel) help confirm that the condition is SLE.n ENA panel may also be used in follow up to an ANA. These supplemental tests are used in conjunction with a person's clinical history to help diagnose or rule out other autoimmune disorders, such as Sjoegren sjÃ¶gren, syndrome polymyositis and. Scleroderma different laboratories may use different test methods to DETECT. ana