what is the function of the enzyme lactase in the digestive system
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HESI PN Exit Exam 2024 Quizlet

1. What is the function of the enzyme lactase in the digestive system?

Correct answer: A

Rationale: The correct answer is A: 'Breaks down lactose into glucose and galactose.' Lactase is an enzyme in the small intestine that specifically breaks down lactose, the sugar found in milk, into glucose and galactose for absorption. Choice B is incorrect because proteins are broken down into amino acids by protease enzymes. Choice C is incorrect because the enzyme amylase converts starch into maltose. Choice D is incorrect as lipase enzymes break down fats into fatty acids.

2. The mother of a 9-month-old child diagnosed with respiratory syncytial virus (RSV) yesterday calls the clinic to inquire if it will be all right to take her infant to a friend's child's first birthday party the following day. Which response should the nurse provide?

Correct answer: A

Rationale: The correct response is A: 'Do not expose other children as the virus is very contagious even without direct contact.' RSV is highly contagious, especially in young children. Allowing the infected child to attend a birthday party can put other children at risk of contracting the virus. Choice B is incorrect as RSV can remain contagious for a period of time. Choice C is not sufficient, as wearing a mask may not entirely prevent the spread of the virus. Choice D is inaccurate, as children under 5 months are not the only ones susceptible to RSV; all young children are at risk.

3. Which electrolyte imbalance is most commonly associated with seizures?

Correct answer: A

Rationale: The correct answer is A: Hyponatremia. Hyponatremia, characterized by low sodium levels in the blood, can lead to cerebral edema and seizures due to water shifting into brain cells. Hypercalcemia (choice B) does not commonly cause seizures but can result in muscle weakness and cardiac arrhythmias. Hyperkalemia (choice C) may lead to muscle weakness and cardiac arrhythmias, but it is less frequently associated with seizures. Hypokalemia (choice D) is linked to muscle weakness and cardiac arrhythmias but is not typically related to seizures.

4. A nurse is assisting in the admission of a young adult female Korean exchange student with acute abdominal pain. When asked about her sexual activity, she looks away. What should the nurse do?

Correct answer: D

Rationale: Observing the client's response to a different question can help gauge her comfort level and understanding, which is essential in culturally sensitive care. By watching her response to a different question, the nurse can assess if the discomfort is related to the specific question or a broader issue. Omitting the question may result in missing crucial information. Asking about an interpreter assumes that the language barrier is the only issue, which may not be the case. Rewording the question may not address the underlying discomfort and could still lead to misinterpretation.

5. In which stage of Maslow's hierarchy of needs is a young adult attempting to achieve when deciding to change his work hours to devote more time to his community?

Correct answer: A

Rationale: The correct answer is A: Self-Actualization. The young adult is striving for self-actualization, the highest level in Maslow's hierarchy of needs. Self-actualization is characterized by individuals seeking personal growth, self-fulfillment, and the ability to contribute to society. Choice B, Intimacy vs. Isolation, focuses on relationships and occurs at a different stage. Choice C, Altruism, although related to community contribution, does not specifically address personal growth and fulfillment as in self-actualization. Choice D, Purposefulness, is not a stage in Maslow's hierarchy of needs and is not directly relevant to the scenario described.

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