ATI RN
ATI Immune System Quizlet Questions
Question 1 of 5
Which of the following is a characteristic of CTL?
Correct Answer: A
Rationale: The correct answer is A because cytotoxic T lymphocytes (CTLs) kill target cells by recognizing specific peptide antigens presented on major histocompatibility complex (MHC) class I molecules. This recognition triggers the CTLs to release cytotoxic molecules that induce apoptosis in the target cells. Choice B is incorrect because CTLs do not die in the process of killing target cells; they survive to continue their immune response. Choice C is incorrect as CTLs do not kill target cells by activating complement, but rather through direct cell-cell contact. Choice D is incorrect because CTLs carry out their effector function in peripheral tissues where they encounter target cells, not specifically in secondary lymphoid tissues.
Question 2 of 5
Match the following:
Correct Answer: C
Rationale: The correct answer is C: 1-b, 2-d, 3-a, 4-c. To determine this, we need to match each item correctly. Step by step: 1) First item is matched with b because it corresponds to the correct sequence. 2) Second item is matched with d as it follows the order. 3) Third item is matched with a as it aligns with the pattern. 4) Fourth item is matched with c to complete the sequence. Other choices lack logical consistency in matching the items as per their correct order, making them incorrect.
Question 3 of 5
Colostrum, the yellowish fluid, secreted by mother during the initial days of lactation is very essential to impart immunity to the newborn infants because it contains:
Correct Answer: D
Rationale: The correct answer is D: Immunoglobulin A. Colostrum contains high levels of Immunoglobulin A (IgA), which is crucial for imparting passive immunity to the newborn. IgA helps protect the infant's mucosal surfaces from infections. Natural killer cells, monocytes, and macrophages are not typically found in colostrum and are not responsible for conferring immunity to the newborn.
Question 4 of 5
The nurse is reinforcing teaching to a person who has tested positive for HIV. Which test should the nurse explain is done to confirm the diagnosis of HIV?
Correct Answer: A
Rationale: The correct answer is A: Western blot. This test is used to confirm the diagnosis of HIV by detecting specific antibodies produced in response to the virus. It is considered the gold standard for confirming HIV infection due to its high specificity and sensitivity. The other choices (B, C, D) are not used to diagnose HIV. Rheumatoid factor and antinuclear antibodies are tests for autoimmune conditions, while immunoglobulin assay measures levels of antibodies in the blood, not specific to HIV.
Question 5 of 5
Identify which statements are correct.
Correct Answer: D
Rationale: The correct answer is D because protozoans do not have cell walls. They are single-celled organisms that lack a rigid cell wall. This distinguishes them from other microorganisms like bacteria, fungi, and algae which have distinct cell wall compositions such as peptidoglycan, chitin, and cellulose respectively. Choice A is incorrect as not all bacteria have peptidoglycan in their cell walls, some have other types of cell wall structures. Choice B is incorrect as not all fungi have chitin in their cell walls, some may have different components. Choice C is incorrect as not all algae have cellulose in their cell walls, there are variations in cell wall composition among different algal species.