HESI A2
HESI A2 Math Portion
1. What is the result of dividing 152 by 2?
- A. 0.0116
- B. 0.116
- C. 76
- D. 11.6
Correct answer: C
Rationale: To divide 152 by 2, you perform the division operation, which is 152 รท 2 = 76. The correct answer is 76. Choices A, B, and D are incorrect. Choice A, 0.0116, is the result of dividing 1 by 152 instead of 152 by 2. Choice B, 0.116, is the result of dividing 1.52 by 2. Choice D, 11.6, is the result of multiplying 152 by 2.
2. What is the function of the liver in the body?
- A. To filter blood
- B. To produce bile and detoxify substances
- C. To produce insulin
- D. To produce red blood cells
Correct answer: B
Rationale: The correct answer is B: 'To produce bile and detoxify substances.' The liver's primary functions include producing bile, which aids in the digestion and absorption of fats, and detoxifying harmful substances in the blood. While the liver does play a role in blood filtration, its key functions are related to bile production and detoxification. Choices C and D are incorrect because the liver does not produce insulin (produced by the pancreas) or red blood cells (produced in the bone marrow).
3. To aspirate fluid, you might use a ___________.
- A. syringe
- B. beaker
- C. test tube
- D. flange
Correct answer: A
Rationale: To aspirate fluid, you would typically use a syringe. A syringe is a device consisting of a tube and a plunger, which allows you to draw fluids such as blood or medication into the tube by pulling back on the plunger. This action is called aspiration, and the syringe is a common tool for this purpose in various medical procedures. Choices B, C, and D are incorrect as they are not typically used for aspiration procedures. A beaker is a glass container used for holding liquids, a test tube is used for holding or mixing small quantities of substances, and a flange is a projecting rim or edge used for strength or for attaching to another object.
4. Select the meaning of the word 'symmetric' in the sentence: 'The symmetric patterns of scarring were evident on the patient's back.'
- A. scabbed
- B. painful
- C. corresponding
- D. geometric
Correct answer: C
Rationale: In this context, 'symmetric' refers to patterns that correspond or are balanced on both sides, exhibiting symmetry. The scarring on the patient's back displayed a mirrored or corresponding arrangement. Choices A, B, and D are incorrect because 'symmetric' does not mean scabbed, painful, or geometric in this sentence.
5. The doctor said he wanted to try other things before attempting an __________ procedure.
- A. Internal
- B. Painful
- C. Experimental
- D. Expensive
Correct answer: C
Rationale: The term 'invasive' refers to a procedure that involves entering the body, usually with a medical instrument or device. In the context provided, the doctor wants to try other non-invasive or less invasive options before resorting to an invasive procedure. 'Experimental' means untested or not yet proven to be effective, which aligns with the idea of exploring alternative methods before considering a more invasive approach. Choices A, B, and D are incorrect because they do not relate to the context of trying alternative procedures that are different from invasive ones.
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