Correct Answer: C

Rationale: The correct answer is C: Slowing ventilation. The lungs regulate acid-base balance by controlling carbon dioxide levels through ventilation. Increasing ventilation helps expel excess carbon dioxide, thus regulating pH. Slowing ventilation would lead to CO2 buildup and an imbalance in acid-base levels. Excreting HCO3- into the blood (choice A) helps maintain pH, while increasing ventilation (choice D) aids in removing excess CO2. Therefore, slowing ventilation is the exception as it would disrupt the acid-base balance by not effectively regulating carbon dioxide levels.

Correct Answer: A

Rationale: The correct answer is A, assessment skills. Assessing the client's current condition, including respiratory status, is crucial in determining priorities for care in asthma management. By utilizing assessment skills, the nurse can gather essential information to identify the client's immediate needs and develop an individualized care plan. Nursing books (B) can provide general information but do not provide real-time data on the client's current status. Client's records (C) may contain historical information but may not reflect the client's current condition. Supervisor's advice (D) is important but should supplement rather than replace the nurse's assessment skills in determining immediate care priorities.

Correct Answer: C

Rationale: Rationale for Answer C: Antibodies are produced by the B-cells. B-cells are a type of lymphocyte that differentiate into plasma cells, which are responsible for producing antibodies in response to antigens. This process is a key component of the humoral immune response. Therefore, the statement that antibodies are produced by the B-cells is true. Summary of Incorrect Choices: A: Antibody-mediated defense occurs through the B-cell system, not the T-cell system. T-cells are involved in cell-mediated immunity. B: Cellular immunity is mediated by T-cells, not antibodies produced by B-cells. D: Lymphocytes increasing with an allergic response is not directly related to the production of antibodies by B-cells. Allergic responses involve a different mechanism.

Correct Answer: C

Rationale: The correct answer is C because thiotepa is a cell cycle-nonspecific alkylating agent that interferes with both DNA replication and RNA transcription. Thiotepa works by cross-linking DNA strands, leading to inhibition of DNA replication and transcription, ultimately causing cell death. This mechanism of action makes it effective against actively dividing cells, such as cancer cells. Choice A is incorrect because thiotepa does not interfere with DNA replication alone. Choice B is incorrect because thiotepa affects both DNA replication and RNA transcription, not just RNA transcription. Choice D is incorrect because thiotepa does not destroy the cell membrane; instead, it acts on the genetic material within the cell.

Correct Answer: C

Rationale: The correct answer is C: Halos around lights. This symptom is specific to acute angle-closure glaucoma due to increased intraocular pressure causing corneal edema. Halos around lights are caused by light diffraction through edematous cornea. Flashing lights and lens opacity are not typically associated with acute angle-closure glaucoma. Flashing lights may be seen in retinal detachment, while lens opacity is more commonly seen in cataracts.