HESI RN
Biology Practice Test
1. A water molecule contains two types of atoms that are covalently bonded. Which of the following makes up a water molecule?
- A. One hydrogen atom and one oxygen atom
- B. One hydrogen atom and two oxygen atoms
- C. Two hydrogen atoms and two oxygen atoms
- D. Two hydrogen atoms and one oxygen atom
Correct answer: D
Rationale: The correct answer is D: Two hydrogen atoms and one oxygen atom. A water molecule consists of two hydrogen atoms covalently bonded to one oxygen atom. This forms a stable structure known as H2O. Choice A is incorrect as water molecule contains two hydrogen atoms. Choices B and C are incorrect as they do not reflect the correct composition of a water molecule.
2. What is the lowest fasting plasma glucose level suggestive of a diagnosis of DM?
- A. 90 mg/dl.
- B. 115 mg/dl.
- C. 126 mg/dl.
- D. 180 mg/dl.
Correct answer: C
Rationale: A fasting plasma glucose level of 126 mg/dl or higher is diagnostic of diabetes mellitus. Choice A (90 mg/dl) is too low to indicate diabetes. Choice B (115 mg/dl) is also below the diagnostic threshold for diabetes. Choice D (180 mg/dl) is above the diagnostic threshold and would indicate uncontrolled diabetes, not the lowest level suggestive of a diagnosis.
3. Discuss the anatomical/physiological changes in pregnancy related to the breasts.
- A. Breast tenderness increases, circulatory supply to the breasts increases, leading to breast enlargement, and colostrum secretion occurs.
- B. Breast tenderness decreases, and there is no significant change in breast size.
- C. Breast changes include decreased tenderness and reduced circulatory supply.
- D. Breasts do not undergo significant changes during pregnancy.
Correct answer: A
Rationale: During pregnancy, the breasts undergo significant anatomical and physiological changes. These changes include increased breast tenderness, an increase in circulatory supply to the breasts, resulting in breast enlargement, and the secretion of colostrum. Choice B is incorrect as breast tenderness actually increases during pregnancy. Choice C is incorrect as the circulatory supply to the breasts increases rather than reduces. Choice D is incorrect as breasts do undergo notable changes during pregnancy.
4. The client has been taking omeprazole (Prilosec) for 4 weeks. The ambulatory care nurse evaluates that the client is receiving the optimal intended effect of the medication if the client reports the absence of which symptom?
- A. Diarrhea
- B. Heartburn
- C. Flatulence
- D. Constipation
Correct answer: B
Rationale: Omeprazole, a proton pump inhibitor, is used as an antiulcer agent to reduce gastric acid secretion. The optimal intended effect of omeprazole is the relief of pain and discomfort associated with gastric irritation, commonly referred to as heartburn. Therefore, the absence of heartburn indicates that the medication is working effectively in managing the client's gastric condition.
5. Which of these clients, all in the terminal stage of cancer, is least appropriate to suggest the use of patient-controlled analgesia (PCA) with a pump?
- A. A young adult with a history of Down syndrome
- B. A teenager who reads at a 4th-grade level
- C. An elderly client with numerous arthritic nodules on the hands
- D. A preschooler with intermittent alertness
Correct answer: D
Rationale: The correct answer is D, a preschooler with intermittent alertness. This client may not have the cognitive ability to effectively use a PCA pump due to their age and alertness level. They may not understand how to self-administer the analgesia. Choices A, B, and C are more appropriate candidates for PCA as they are likely to have better comprehension and ability to operate the PCA pump compared to a preschooler with intermittent alertness.