32-year-old with sickle cell crisis. Which physician order will you implement first?

Correct Answer: C

Rationale: The correct answer is C because the first priority in a sickle cell crisis is to establish IV access for hydration and medication administration. Hydration helps prevent vaso-occlusive crises. Choice A (Morphine) and B (Oxygen) are important interventions but come after IV access. Choice D (Vaccines) is important for long-term prevention but not immediate management of a crisis.

Correct Answer: A

Rationale: The correct answer is A because a 20-year-old with possible acute myeloid leukemia (AML) who just arrived requires immediate assessment for potential critical conditions. AML is an aggressive cancer that can rapidly progress, necessitating timely intervention. The other choices are incorrect because aplastic anemia (B) and lymphedema (C) are chronic conditions that do not typically require immediate assessment. The patient refusing chemo for lymphoma (D) also does not pose an immediate threat compared to the urgency of assessing a new patient with possible AML.

Correct Answer: A

Rationale: Step-by-step rationale: 1. Plasma is the liquid portion of blood. 2. Phospholipid is a component of platelet membrane needed for coagulation. 3. Calcium is required for the activation of coagulation factors. Therefore, the correct answer is A. Summary: B: Thromboplastin is not an ingredient in PTT. C: Thromboplastin is not part of PTT. D: Thrombin is a product of the coagulation cascade, not an ingredient in PTT.

Correct Answer: A

Rationale: The correct answer is A: Alpha and beta. Hemoglobin A in normal adults consists of two alpha and two beta globin polypeptide chains. This is the most common form of hemoglobin in adults. The other choices (B: Alpha and epsilon, C: Alpha and delta, D: Alpha and brotherton) are incorrect because epsilon, delta, and brotherton are not the typical polypeptide chains found in adult hemoglobin. Hemoglobin F contains gamma and alpha chains, not epsilon or delta. Brotherton is not a known polypeptide chain in hemoglobin.

Correct Answer: C

Rationale: The correct answer is C: Rhodnius prolixus. This insect is a vector for Trypanosoma cruzi, causing Chagas disease. Palpebral edema, lymphadenopathy, and megaesophagus are common manifestations. Glossina morsitans transmits African Trypanosomiasis (sleeping sickness) with different symptoms. Ixodes scapularis transmits Lyme disease. Simulium damnosum transmits Onchocerciasis (river blindness). Thus, Rhodnius prolixus is the correct vector based on the provided symptoms.