HESI A2
Chemistry HESI A2 Quizlet
1. Which type of change occurs when no change is made to the chemical composition of a substance?
- A. Chemical
- B. Physical
- C. Nuclear
- D. Mechanical
Correct answer: B
Rationale: A physical change refers to alterations in the state of matter without modifying the chemical composition of the substance. Examples of physical changes include changes in state (solid, liquid, gas), shape, size, or phase. In a physical change, the substance may look different or behave differently, but its chemical structure remains the same. On the other hand, chemical changes involve the breaking and forming of chemical bonds, resulting in the creation of entirely new substances with different chemical properties. Nuclear changes involve alterations in the nucleus of an atom, such as radioactive decay. Mechanical changes refer to changes in the position or motion of an object caused by applied forces, like pushing, pulling, or twisting.
2. Which of the following words or phrases fits best in the following sentence? The radiology department sends Troy to pick up lunch ______ it isn’t too busy at the office.
- A. as long as
- B. as if
- C. after
- D. unless
Correct answer: A
Rationale: The phrase 'as long as' is used to indicate a condition that needs to be met for the main clause to happen. In this sentence, the radiology department sends Troy to pick up lunch only if it isn't too busy at the office, so 'as long as' is the most suitable phrase to convey this conditional relationship. Choice B, 'as if,' implies a hypothetical comparison rather than a condition. Choice C, 'after,' suggests a sequence of events rather than a condition. Choice D, 'unless,' introduces a negative condition which does not fit the context of the sentence.
3. What is the process of cell division that results in two daughter cells with identical genetic material?
- A. Mitosis
- B. Meiosis
- C. Binary Fission
- D. Budding
Correct answer: A
Rationale: The correct answer is A, Mitosis. Mitosis is the process of cell division in which a cell divides and produces two daughter cells that are genetically identical to the parent cell. Choice B, Meiosis, is a type of cell division that produces gametes with half the number of chromosomes. Choice C, Binary Fission, is a form of asexual reproduction in single-celled organisms. Choice D, Budding, is a form of asexual reproduction where a new organism develops from an outgrowth or bud on the parent.
4. What does 'invasive' mean?
- A. Harmless
- B. Entering into a body part
- C. Mildly irritating
- D. Non-penetrative
Correct answer: B
Rationale: The correct answer is 'B: Entering into a body part.' 'Invasive' refers to something that invades or penetrates into a body part. Choice A, 'Harmless,' is incorrect as invasive implies a negative impact. Choice C, 'Mildly irritating,' is incorrect as invasive implies a more serious intrusion. Choice D, 'Non-penetrative,' is incorrect as invasive specifically denotes penetration or entry.
5. When patients are being counseled, what is happening?
- A. They are being discharged
- B. They are being advised
- C. They are being neglected
- D. They are being comforted
Correct answer: B
Rationale: When patients are being counseled, they are being advised or guided. Counseling involves providing support, guidance, and advice to help patients cope with their challenges. Choice A is incorrect because counseling is not about discharging patients. Choice C is incorrect because counseling is the opposite of neglect; it is actively providing support. Choice D is incorrect because while comfort may be a part of counseling, the primary focus is on providing guidance and advice to address issues, not just comfort.
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