what word is best to substitute for the underlined words in the following sentence the nurse told silvios family that visiting hours were over but sil
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Nursing Elites

HESI A2

HESI A2 Grammar Practice Test

1. What word is best to substitute for the underlined words in the following sentence? The nurse told Silvio’s family that visiting hours were over, but Silvio’s family could come back early tomorrow morning.

Correct answer: A

Rationale: In the sentence, 'The nurse told Silvio’s family that visiting hours were over, but Silvio’s family could come back early tomorrow morning,' the second occurrence of 'Silvio’s family' can be effectively substituted with the word 'them' to avoid repetition and improve clarity. Using 'them' in this context helps to make the sentence more concise and less redundant, enhancing the overall flow and readability. Choice B ('us') is incorrect as it would imply that Silvio’s family could come back early tomorrow morning to the speaker and others, which is not the intended meaning. Choice C ('they') is incorrect as it would shift the subject from 'Silvio’s family' to a third-person perspective, altering the original meaning. Choice D ('those') is incorrect as it does not appropriately refer back to 'Silvio’s family' in a clear and concise manner.

2. Which muscle is responsible for breathing?

Correct answer: A

Rationale: The diaphragm is the primary muscle responsible for breathing. It is a large, dome-shaped muscle located at the base of the chest cavity. When it contracts, it flattens, increasing the volume of the chest cavity and causing inhalation. When it relaxes, it returns to its dome shape, decreasing the volume of the chest cavity and causing exhalation. The intercostal muscles, located between the ribs, assist the diaphragm in breathing by expanding and contracting the chest cavity. The rectus abdominis and pectoralis major are not directly involved in the process of breathing.

3. Why is yeast used to make bread rise?

Correct answer: C

Rationale: Yeast is used to make bread rise because it carries out fermentation, producing carbon dioxide gas. The carbon dioxide gas gets trapped in the dough, causing it to rise and create a fluffy texture in the bread. Choices A, B, and D are incorrect because yeast does not engage in photosynthesis, so it does not produce oxygen gas, does not carry out photosynthesis to form carbon dioxide, and does not produce carbon dioxide through aerobic respiration. Yeast's fermentation process is essential for bread rising.

4. Convert 0.007 kilograms to grams.

Correct answer: A

Rationale: To convert kilograms to grams, you need to multiply by 1000 since there are 1000 grams in a kilogram. Therefore, 0.007 kilograms is equal to 0.007 x 1000 = 7 grams. Choice A is correct. Choice B is incorrect as it incorrectly multiplies by 10 instead of 1000. Choice C is incorrect as it incorrectly moves the decimal point one place to the right. Choice D is incorrect as it incorrectly moves the decimal point two places to the right.

5. Which of the following is not true about enzymes?

Correct answer: B

Rationale: Enzymes lower the activation energy needed for a reaction to occur, not raise it. By lowering the activation energy, enzymes facilitate reactions, making them occur more easily and rapidly. Choice A is correct as enzymes indeed catalyze reactions. Choice C is correct as enzymes have specific active sites where substrates bind. Choice D is correct as enzymes are commonly proteins, although some RNA molecules also exhibit catalytic properties.

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