Answer:
Because of atmospheric absorption, X-ray telescopes must be carried to high altitudes by rockets or balloons or placed in orbit outside the atmosphere. Balloon-borne telescopes can detect the more penetrating (harder) X-rays, whereas those carried aloft by rockets or in satellites are used to detect softer radiation.
Explanation:
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Answer:
No attached reference is given so lets have a look at the organelles in an animal cell generally.
Explanation:
Nucleus: The nucleus is the area where the hereditary material, DNA, is present.
Cell membrane: Cell membrane is the outer membrane which protects the internal cell environment.
Cytoplasm: Cytoplasm is the fluid in which all organelles of a cell float.
Vacuole: It is the storage house of a cell.
Ribosomes: The site where proteins are made.
Endoplasmic reticulum: Involved in protein manfacture.
Golgi complex: Area where protiens are modified and mackaged.
Mitochondria: Power house of the cell.
The first one is the correct answer neurotransmitter
The responses observed in type IV hypersensitivities result from the action of T cells and phagocytes.
Hypersensitivity IV type, also called delayed-type hypersensitivity (DTH), involves T cell-antigen interactions that cause activation and secretion of cytokines. This type of hypersensitivity requires sensitized lymphocytes that respond 24–48 hours after exposure to soluble antigens. A type IV hypersensitivity reaction is a cell-mediated reaction that can occur in response to contact with certain allergens, resulting in what is called contact dermatitis, or in response to certain diagnostic procedures such as the tuberculin skin test. Certain allergens need to be avoided to treat this condition. Type IV hypersensitivity response is observed results from the action of T cells and macrophages while other types are mediated by antibodies. This reaction occurs at least 1–3 days after the initial exposure. Type IV hypersensitivity is the mechanism of many autoimmune disorders.
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