what is the meaning of the word shifts as used in the third paragraph

HESI A2

HESI A2 Reading Comprehension

1. What is the meaning of the word 'shifts' as used in the third paragraph?

A. Alterations
B. Stints
C. Removals
D. Transfers

Correct answer: A

Rationale: In this context, 'shifts' refers to changes or alterations in brain chemistry and electrophysiology. The word 'alterations' best captures the idea that significant changes are occurring in the brain. 'Stints' (choice B) refer to short periods of time or work, which is not the meaning intended here. 'Removals' (choice C) and 'transfers' (choice D) do not fit the context of the sentence and are not related to the changes happening in the brain as described in the extract.

2. What can the reader conclude from this passage about ponds and lakes?

A. They are examples of groundwater reservoirs.
B. They are part of the evaporation process.
C. They are formed by runoff.
D. They are formed by condensation.

Correct answer: A

Rationale: The correct answer is A: 'They are examples of groundwater reservoirs.' The passage mentions that runoff collects in groundwater reservoirs, among other places. Ponds and lakes are typically reservoirs of groundwater, as stated in the passage. Choice B is incorrect because ponds and lakes are not directly mentioned as part of the evaporation process. Choice C is incorrect as ponds and lakes are not stated to be formed by runoff. Choice D is incorrect as ponds and lakes are not formed by condensation.

3. What can be inferred from the passage about Daylight Savings Time?

A. It is primarily used to save energy during certain months.
B. It was universally accepted upon its introduction.
C. The US government opposed the idea initially.
D. It was implemented to prevent jetlag.

Correct answer: A

Rationale: The correct answer is A: "It is primarily used to save energy during certain months." The passage clearly states that Daylight Savings Time was first put into practice by the German government in 1916 to save energy during the First World War. The US followed suit in 1918. This measure was unpopular initially, but the energy crisis in the 1970s led to making it a law. Choices B, C, and D are incorrect. Choice B is incorrect as the passage mentions that the British government initially refused the idea, and it was unpopular when first implemented. Choice C is incorrect as it was not the US but the British government that opposed the idea initially. Choice D is incorrect as Daylight Savings Time was not implemented to prevent jetlag, but rather to save energy and make better use of daylight hours.

4. The word 'track' as used in the last paragraph of the passage can best be defined as ___________.

A. Keep a record of
B. A new attitude
C. Follow carefully
D. A paved, circular path

Correct answer: D

Rationale: In the context of the passage, 'track' refers to a 'paved, circular path' for running or walking. The last sentence of the passage encourages people to get off the couch and onto the track, indicating a physical path for exercise. Choice A, 'Keep a record of,' is incorrect as the context does not suggest any relation to recording information. Choice B, 'A new attitude,' is unrelated to the context of exercise and fatigue reduction. Choice C, 'Follow carefully,' does not fit the context of physical activity and energy levels discussed in the passage.

5. Why did Strauss set up a net during the construction of the Golden Gate Bridge?

A. For suspension
B. For balance
C. For aesthetics
D. For safety

Correct answer: D

Rationale: Strauss set up a net to ensure the safety of the workers in case of falls during the construction of the Golden Gate Bridge. Safety nets were essential to protect the workers from potential accidents or falls while working on the bridge. Choice A ('For suspension') is incorrect as safety nets were not used for suspension purposes but rather for worker safety. Choice B ('For balance') is incorrect as the balance of the bridge was maintained by other construction elements, not safety nets. Choice C ('For aesthetics') is incorrect as safety nets are not related to the visual appearance of the bridge but rather to the protection of the workers.