ATI RN
ATI the Immune System Test Quizlet Questions
Question 1 of 5
Which of the following is the best match between antibody class and major antibody effector function?
Correct Answer: A
Rationale: The correct answer is A: IgG: Opsonization. IgG antibodies are known for their role in opsonization, where they tag pathogens for phagocytosis by immune cells. This process enhances the removal of pathogens. IgA is mainly involved in mucosal immunity and not complement activation, making choice B incorrect. IgE is associated with allergic reactions and not antibody-dependent cell-mediated cytotoxicity as stated in choice C. IgM is the first antibody produced in response to an infection and plays a role in neonatal immunity, making choice D incorrect.
Question 2 of 5
Identify the option that represents the correct order of events in naïve T cell activation:
Correct Answer: B
Rationale: The correct order of events in naïve T cell activation is: antigen recognition, clonal expansion, entry into the site of infection. First, T cells must recognize the specific antigen presented by antigen-presenting cells. This recognition triggers clonal expansion, where T cells proliferate and differentiate into effector cells. Finally, the activated T cells migrate to the site of infection to combat the pathogen. Option B is correct because it follows this sequential order. Options A, C, and D are incorrect because they do not adhere to the correct sequence of events in naïve T cell activation.
Question 3 of 5
If a person is infected with some deadly microbes to which quick immune response is required, we need to directly inject the preformed antibodies. This type of immunisation is known as:
Correct Answer: B
Rationale: Passive immunisation involves injecting preformed antibodies to provide immediate protection against microbes. This is suitable for quick immune response in infected individuals. Active immunisation, on the other hand, stimulates the body to produce its own antibodies over time, which is not ideal for immediate protection. Allergic immunisation is unrelated to providing antibodies. There is no immunisation type of "No such type of immunisation exist."
Question 4 of 5
The nurse is reviewing the immune system prior to discussing the actions with a patient. What type of cell should the nurse identify that is involved in cell-mediated immunity and has a cytotoxic action on tumor cells?
Correct Answer: C
Rationale: The correct answer is C: Natural killer cells. Natural killer cells are involved in cell-mediated immunity and have cytotoxic actions on tumor cells. They are part of the innate immune system and can directly kill infected or cancerous cells. Lysosomes (A) are organelles within cells that break down waste materials. Memory cells (B) are a type of immune cell that "remembers" previous infections to mount a faster response upon re-exposure. Histocompatibility cells (D) are involved in recognizing self from non-self in transplant situations, not in cytotoxic actions on tumor cells.
Question 5 of 5
The nurse has contributed to an educational program for staff members. Which statement made by a staff member indicates a correct understanding of how passive immunity is provided?
Correct Answer: D
Rationale: The correct answer is D, administration of immunoglobulin, for passive immunity. Immunoglobulin contains pre-formed antibodies that provide immediate protection against specific pathogens. Administering immunoglobulin transfers these antibodies to the recipient, offering temporary immunity. Choice A, having an acute disease, does not involve receiving external antibodies. Choice B, administration of a toxoid, induces active immunity against toxins, not passive immunity. Choice C, administration of a vaccine, stimulates active immunity by triggering the body to produce its antibodies, not providing immediate protection like passive immunity with immunoglobulin.