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Anonymous users2024-02-131) Formed nucleus; (2) cutting off the route of transmission; (3) Specific immunity III; (4) Water, inorganic salts, uric acid, urea and other wastes.
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Anonymous users2024-02-12This question is a basic knowledge question, which examines the preventive measures of infectious diseases, the structural characteristics of bacteria, the non-specific immunity of the human body and the significance of specific immunity and urination Answer: Solution: Infectious diseases are diseases caused by pathogens that are transmitted between organisms, and are divided into digestive tract infectious diseases, respiratory tract infectious diseases, blood infectious diseases and body surface infectious diseases according to the transmission route of infectious diseases The preventive measures for infectious diseases are:
Controlling the source of infection, cutting off the transmission route and protecting the susceptible population The basic structural characteristics of bacteria are that there is no formed nucleus in the cell The body's immunity is divided into specific immunity and non-specific immunity, and non-specific immunity is the immunity that everyone is born with a defensive effect against many pathogens; Specific immunity is acquired immunity that only works against a specific pathogen or foreign body The meaning of urination is to discharge metabolic wastes such as water, inorganic salts, and urea from the body, condition the balance of water and inorganic salts in the human body, and maintain the normal physiological function of tissue cells Therefore, (1) Enterohemorrhagic Escherichia coli is the main culprit that causes the disease and leads to death, and from the perspective of cell structure, it does not have a formed nucleus
2) Some experts pointed out: "This E. coli is mainly transmitted through food and the excrement of infected patients and animals Therefore, people can effectively prevent this germ as long as they pay strict attention to personal dietary hygiene" From the perspective of measures to prevent infectious diseases, these suggestions of experts belong to cutting off the transmission route
3) At present, some hospitals in Germany have begun a small range of trials of the injection of monoclonal antibodies into this disease, and have achieved initial results The immunity obtained by humans through this method is specific immunity, which belongs to the third line of defense of human immunity
4) Relevant data show that one-third of the patients with severe disease will lose kidney function and must undergo hemodialysis** You think the reason for this is to help patients eliminate waste products such as water, inorganic salt urea, etc., which are metabolized in the body
So the answer is: (1) a formed nucleus; (2) cutting off the route of transmission; (3) Specific immunity III; (4) Water, inorganic salts, uric acid, urea and other wastes.
Comments: There is no nucleus in bacterial cells, which is often overlooked
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Anonymous users2024-02-111) Nucleus, pathogen.
(2) cutting off the route of transmission;
(3) Specific immunity III;
4) Urea, uric acid.
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Anonymous users2024-02-10The student experiments were: practicing the use of a microscope; Observation of plant cells: observation of human oral epithelial cells; Observe the basic tissues of the human body; Observe paramecium; Observe the structure of the seed; Observe the structure of the blade; Green leaves make organic matter in the presence of light; Measure the difference in chest circumference; Permanent smears of human blood are viewed with a microscope; Observe the flow of blood in the tail fin of small fish; knee jerk reflex; 12 experiments such as raising and observing earthworms.
Demonstration experiments include; The seeds underwent an energetic change during germination; The seeds release carbon dioxide during germination; Seeds absorb oxygen during germination; Photosynthesis produces oxygen; the digestive effect of bile on food; the relationship between respiratory movement and diaphragmatic movement; Fermentation phenomenon. A total of 6 demonstration experiments.
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Anonymous users2024-02-09Junior Biology Experiment: Observe the structure of leaves.
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It's hard to find. There are only **.