ATI RN
Lymphatic Immune System Quizlet Questions
Question 1 of 5
Which of the following is not usually observed in severe Covid-19 cases?
Correct Answer: A
Rationale: Step-by-step rationale: 1. In severe Covid-19 cases, there is usually a dysregulated immune response. 2. Type I Interferon plays a crucial role in early antiviral defense. 3. However, in severe cases, there is often a blunted or delayed response of type I Interferon. 4. This delayed response contributes to viral persistence and hyperinflammation. 5. Therefore, the prompt and sustained production of type I Interferon is not usually observed in severe Covid-19 cases. Summary: - Choice A is correct as the prompt and sustained production of type I Interferon is not typically observed in severe Covid-19 cases. - Choices B, C, and D are incorrect as autoantibodies, a delayed CD4 T cell response, and elevated levels of inflammatory cytokines are commonly observed in severe Covid-19 cases.
Question 2 of 5
A patient is experiencing an immune response that involves the T lymphocytes. For which types of immunity should the nurse plan care for this patient?
Correct Answer: D
Rationale: The correct answer is D: Cell-mediated immunity. T lymphocytes are primarily involved in cell-mediated immunity, where they directly attack infected cells or pathogens. This type of immunity is crucial in fighting intracellular pathogens like viruses. Other choices are incorrect because: A: Passive immunity involves receiving pre-formed antibodies, not T lymphocytes. B: Humoral immunity involves B cells producing antibodies, not T lymphocytes. C: Acquired immunity is a general term encompassing both humoral and cell-mediated immunity, but T lymphocytes specifically play a key role in cell-mediated immunity.
Question 3 of 5
The nurse has administered prescribed allergen injections twice a week for several weeks to an individual with a bee sting allergy. The patient misses three appointments. What action should the nurse take on the patient's next visit?
Correct Answer: A
Rationale: The correct answer is A: Consult physician to confirm the dosage to be given. The nurse should consult the physician because missing three appointments may affect the patient's progress and tolerance to the allergen injections. The physician needs to reassess the situation and determine the appropriate action, which may involve adjusting the dosage or reevaluating the treatment plan. This ensures patient safety and effectiveness of the treatment. Summary: B: Administering the same dosage as the last visit may not be appropriate without physician consultation. C: Administering the dosage as originally prescribed may not account for any changes in the patient's condition. D: Restarting the entire immunotherapy schedule is an extreme measure and should only be considered after consultation with the physician.
Question 4 of 5
Phagocytosis is not a characteristic of which groups?
Correct Answer: D
Rationale: Phagocytosis is a process where cells engulf and digest particles. Archaea lack membrane-bound organelles, including phagosomes, making phagocytosis impossible. Protozoans, algae, and fungi have the necessary cellular structures for phagocytosis. Therefore, the correct answer is D. Protozoans, algae, and fungi can perform phagocytosis due to their cellular structure and function, making choices A, B, and C incorrect.
Question 5 of 5
Superoxide dismutase is an enzyme that catalyzes the conversion of oxygen radicals to peroxides. Which groups of organisms do not have this enzyme?
Correct Answer: D
Rationale: The correct answer is D: oxylabile anaerobes. These organisms cannot survive in the presence of oxygen and are sensitive to oxygen radicals. Superoxide dismutase is essential for organisms that are exposed to oxygen, as it helps convert harmful oxygen radicals into less harmful peroxides. Therefore, organisms that lack this enzyme, like oxylabile anaerobes, would not be able to detoxify oxygen radicals and would not survive in aerobic environments. A: Aerobes have superoxide dismutase to protect against oxygen radicals. B: Facultative anaerobes can switch between aerobic and anaerobic metabolism and would benefit from having superoxide dismutase. C: Oxyduric anaerobes are resistant to oxygen and can still benefit from superoxide dismutase for detoxification.