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The English passive voice typically involves forms of the verbs to be or to get followed by a passive participle as the subject complement—sometimes referred to as a passive verb. [ 1 ] English allows a number of additional passive constructions that are not possible in many other languages with analogous passive formations to the above.
The active voice is the most commonly used in many languages and represents the "normal" case, in which the subject of the verb is the agent. In the active voice, the subject of the sentence performs the action or causes the happening denoted by the verb.
Signaling molecules can be synthesized from various biosynthetic pathways and released through passive or active transports, or even from cell damage. Each cell is programmed to respond to specific extracellular signal molecules, and is the basis of development , tissue repair , immunity , and homeostasis .
In molecular biology, a reporter gene (often simply reporter) is a gene that researchers attach to a regulatory sequence of another gene of interest in bacteria, cell culture, animals or plants. Such genes are called reporters because the characteristics they confer on organisms expressing them are easily identified and measured, or because ...
Verbs such as λέγω require either ὡς or ὅτι as an introductory particle. If the introductory verb is in a secondary tense, the finite verb of the ὡς / ὅτι clause is usually changed from the indicative mood into the corresponding tense in the optative mood, but the indicative verb is sometimes retained for vividness.
Sentinel systems involve a network of reporting sites, typically doctors, laboratories and public health departments. Surveillance sites must offer: [3] commitment to resource the program; a high probability of observing the target disease, a laboratory capable of systematically testing subjects for the disease, experienced, qualified staff.
In biology, tissue is an assembly of similar cells and their extracellular matrix from the same embryonic origin that together carry out a specific function. [1] [2] Tissues occupy a biological organizational level between cells and a complete organ.
In immunology, passive immunity is the transfer of active humoral immunity of ready-made antibodies.Passive immunity can occur naturally, when maternal antibodies are transferred to the fetus through the placenta, and it can also be induced artificially, when high levels of antibodies specific to a pathogen or toxin (obtained from humans, horses, or other animals) are transferred to non-immune ...