ATI RN
Immune System Quizlet Questions
Question 1 of 5
What is the normal pH range of the blood and what ratio of base to acid does this reflect?
Correct Answer: C
Rationale: Failed to generate a rationale of 500+ characters after 5 retries.
Question 2 of 5
All of the following are true with respect to IgM antibodies EXCEPT which one
Correct Answer: D
Rationale: The correct answer is D. IgM antibodies do not mediate allergic reactions. IgE antibodies are responsible for allergic reactions. IgM antibodies fix complement, occur on the surface of lymphocytes, and predominate in the primary response to antigens. IgM is the first antibody produced in response to an infection, playing a key role in the activation of the complement system. IgM antibodies are mainly found in the blood and lymphatic system, not on the surface of lymphocytes. IgE antibodies are the primary mediators of allergic reactions by triggering the release of histamine and other inflammatory molecules.
Question 3 of 5
The major immunoglobulin family to which a particular immunoglobulin belongs can be determined by sequential analysis of the 110 amino acids beginning from the
Correct Answer: C
Rationale: The correct answer is C: Amino terminus of the heavy chain. This is because the amino acid sequence of immunoglobulins is determined by the heavy chain, making it crucial for identifying the immunoglobulin family. The heavy chain contains the variable (V), diversity (D), joining (J), and constant (C) regions essential for classifying immunoglobulins. Analyzing the amino terminus of the heavy chain allows for the identification of these regions, which are unique to each immunoglobulin class. The other choices are incorrect because the light chain does not contain the necessary regions for determining the immunoglobulin family, making the amino terminus of the heavy chain the key starting point for analysis.
Question 4 of 5
A patient has come to the ambulatory care clinic with a sprain. The nurse correctly differentiates a grade 2 sprain from a grade 3 sprain with the assessment of which finding?
Correct Answer: D
Rationale: The correct answer is D: Minor loss of function. A grade 2 sprain involves partial tearing of the ligament, leading to moderate pain, swelling, and a significant loss of function. In contrast, a grade 3 sprain involves complete tearing of the ligament, resulting in severe pain, significant swelling, and major loss of function. By assessing for minor loss of function, the nurse can differentiate between the two grades of sprains. Choices A, B, and C are incorrect because they do not specifically differentiate between a grade 2 and grade 3 sprain based on the level of functional impairment.
Question 5 of 5
Which major advantage is specific to external fixation devices?
Correct Answer: C
Rationale: The correct answer is C: Greater freedom of movement. External fixation devices provide this advantage by allowing for adjustability and mobility of the affected limb. This is crucial for rehabilitation and preventing joint stiffness. Choice A (Faster healing time) is not specific to external fixation devices and can vary case by case. Choice B (Allowance for immediate weight bearing) may not always be recommended due to the complexity of the injury. Choice D (Pain reduction) is not a major advantage of external fixation devices, as they primarily focus on stabilizing fractures rather than directly reducing pain.