description of events in the order of their occurrence

HESI A2

HESI A2 Practice Test Vocabulary

1. What term refers to the description of events in the order of their occurrence?

A. Chronology
B. Notation
C. Documentation
D. Helicon

Correct answer: A

Rationale: The correct answer is 'Chronology,' which specifically means the arrangement of events in the order of their occurrence. 'Notation' refers to a system of symbols or signs used to represent information. 'Documentation' is the process of recording information, while 'Helicon' does not relate to the description of events.

2. Radioactive isotopes are frequently used in medicine. What kind of half-life would a medical isotope probably have?

A. Seconds-long
B. Days-long
C. Years-long
D. Many years long

Correct answer: B

Rationale: Medical isotopes used in diagnosis and treatment need to have a relatively short half-life to minimize radiation exposure to patients. If the half-life were too long (such as many years) or even years-long, the radiation would persist for too long and could be harmful to the patient. Seconds-long half-lives would not provide enough time for the isotope to be effective. Days-long half-lives strike a balance between providing enough time for the isotope to be used effectively and minimizing radiation exposure.

3. During which phase of cell division do the chromosomes replicate?

A. Prophase
B. Interphase
C. Anaphase
D. Telophase

Correct answer: B

Rationale: Chromosomes replicate during the interphase of the cell cycle. Interphase is the phase where the cell prepares for division by undergoing various activities such as growth, DNA replication, and protein synthesis. During DNA replication in interphase, each chromosome in the cell is duplicated to form two sister chromatids, which are then separated during cell division. Prophase is the phase where the chromosomes condense, and the nuclear envelope breaks down. Anaphase is the phase where sister chromatids are pulled apart towards opposite poles of the cell. Telophase is the phase where the nuclear envelope reforms, and chromosomes begin to decondense.

4. Choose the best summary of the passage about High Fructose Corn Syrup.

A. After extensive studies, scientists recommend removing HFCS from grocery products.
B. A recent study on rats confirms suspicions that HFCS contributes to unhealthful weight gains.
C. Until more research is done, using HFCS is preferable to replacing it with refined sugar.
D. Avoiding HFCS can have immediate, healthful results on overweight patients, as suggested by the AMA.

Correct answer: B

Rationale: The best summary of the passage is choice B. The passage discusses concerns about the impact of high fructose corn syrup (HFCS) on health, particularly its link to obesity. It mentions a recent study on rats that confirms suspicions about HFCS contributing to unhealthful weight gains. Choices A, C, and D are incorrect as they introduce recommendations or implications not explicitly mentioned in the passage. Choice A goes beyond the information by stating that scientists recommend removing HFCS from grocery products, choice C suggests that using HFCS is preferable until more research is done, and choice D implies immediate healthful results on overweight patients by avoiding HFCS, as suggested by the AMA, which is not supported by the passage.

5. What is the function of the adrenal glands?

A. To regulate blood sugar
B. To produce hormones
C. To produce red blood cells
D. To filter blood

Correct answer: B

Rationale: The adrenal glands function to produce hormones such as adrenaline and cortisol. These hormones play essential roles in regulating metabolism, immune response, and the body's response to stress. Therefore, the correct answer is that the adrenal glands produce hormones. Choices A, C, and D are incorrect as regulating blood sugar is primarily done by the pancreas, producing red blood cells is the function of the bone marrow, and filtering blood is carried out by the kidneys, not the adrenal glands.