HESI A2
HESI A2 Vocabulary 2023
1. Select the meaning of the word 'reflex' in the sentence: 'The typical patellar reflex takes only 50 milliseconds between the initial tap and the leg extension.'
- A. Replication
- B. Convulsion
- C. Reaction
- D. Stretching
Correct answer: C
Rationale: In the context of the sentence, the word 'reflex' indicates a quick, automatic response by the body to a stimulus. The patellar reflex, also known as the knee-jerk reflex, involves the leg extending in response to a tap on the patellar tendon. Therefore, the word 'reaction' aligns closely with the nature of the patellar reflex in terms of a rapid and involuntary response. Choices A, B, and D are incorrect: 'Replication' does not capture the concept of a bodily response, 'convulsion' implies a sudden and uncontrollable movement which is not specific to the nature of the patellar reflex, and 'stretching' does not encompass the automatic and rapid nature of a reflex action.
2. What is Diffusion?
- A. Movement of materials from low concentration to high concentration
- B. Movement of materials from high concentration to low concentration
- C. Absorption of nutrients
- D. Breaking of materials
Correct answer: B
Rationale: Diffusion is the process where substances move from an area of high concentration to an area of low concentration. This movement occurs due to the random motion of particles and continues until equilibrium is reached. Choice A is incorrect because diffusion occurs down the concentration gradient, from high to low concentration, not from low to high concentration. Choice C is incorrect as it refers to the uptake of substances by cells, not the general process of diffusion. Choice D is incorrect as it does not accurately describe the process of diffusion; diffusion involves the movement of substances, not the breaking of materials.
3. What does 'Obsolete' mean?
- A. Innovative
- B. Outdated
- C. Effective
- D. Advanced
Correct answer: B
Rationale: The correct answer is 'B: Outdated.' Obsolete refers to something that is outdated or no longer in use. 'Innovative' (choice A) means introducing new ideas or methods; 'Effective' (choice C) means successful in producing a desired result; 'Advanced' (choice D) means far on or ahead in development or progress. Therefore, 'Outdated' is the most appropriate antonym for 'Obsolete.'
4. The abbreviation HPV on a medical form refers to a particular ___________.
- A. blood condition
- B. viral infection
- C. heart rate
- D. therapy
Correct answer: B
Rationale: The abbreviation HPV stands for Human Papillomavirus, which is a viral infection commonly transmitted through sexual contact. It is known to cause genital warts and various types of cancers, including cervical cancer. Choice A is incorrect because HPV is not related to a blood condition. Choice C is incorrect because HPV does not refer to heart rate. Choice D is incorrect as HPV is not a therapy but rather a virus.
5. Which of the following sentences is written in the passive voice?
- A. The homework was completed by the student
- B. The student completed the homework
- C. The teacher is grading the papers
- D. The store opens at 9 AM
Correct answer: A
Rationale: The correct answer is A: 'The homework was completed by the student.' This sentence is in the passive voice because the subject (homework) is being acted upon by the student. In passive voice constructions, the subject receives the action rather than performing it. Choices B, C, and D are in active voice where the subject performs the action. In choice B, 'The student completed the homework,' the subject (student) is the one performing the action of completing the homework.
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