HESI A2 Vocabulary 2024

Correct Answer: B

Rationale: The correct answer is B: corpus luteum. The corpus luteum is a temporary endocrine structure in the ovary that forms after ovulation. It plays a crucial role in the production of progesterone, which is essential for preparing the uterus for possible pregnancy. The other choices are incorrect: A) corpus delicti refers to the body of evidence in a crime, C) corpus striatum is a part of the brain involved in movement control, and D) corpus callosum is a structure connecting the two hemispheres of the brain. Therefore, B is the correct answer as it specifically refers to the mass of tissue formed in the ovary after ovulation.

Correct Answer: C

Rationale: Step 1: In a research study, a placebo is an inactive substance given to participants to compare the effects of the active treatment. Step 2: The purpose of a placebo is to serve as a control group for comparison with the group receiving the experimental drug. Step 3: Therefore, the meaning of 'placebo' in the sentence is 'control' as it is used for comparison purposes. Step 4: Choice A (Fallback) and D (Curative) do not accurately describe the role of a placebo in this context. Step 5: Choice B (Substitute) is not the best fit as the placebo is not substituting the actual treatment, but rather serving as a comparison point. Summary: The correct answer is C (Control) because a placebo is used as a comparison group in research studies, not as a fallback, substitute, or curative treatment.

Correct Answer: D

Rationale: The correct answer is D: Composed. Unruffled means calm and composed, so the word "composed" is a synonym for unruffled. "Concerned" means worried or anxious, opposite of unruffled. "Wholesome" means healthy or good, unrelated to unruffled. "Tedious" means boring or monotonous, also unrelated to unruffled. Therefore, the best choice is "Composed" as it aligns with the meaning of unruffled.

Correct Answer: B

Rationale: The correct answer is B: bleeding. A hemostat is a surgical tool used to control bleeding by clamping blood vessels. It does not address pain (A), fever (C), or coughing (D). Pain is managed with analgesics, fever with antipyretics, and coughing with cough suppressants. Therefore, the correct choice is B as a hemostat is specifically designed for controlling bleeding during medical procedures.

Correct Answer: C

Rationale: The correct answer is C: formulaic. Systematic refers to being organized and planned, which aligns with the definition of formulaic, suggesting a structured and methodical approach. In contrast, A (involuntary) means not done by choice, B (universal) refers to being applicable everywhere, and D (manual) pertains to being done by hand. Therefore, C is the most suitable synonym for systematic in this context.