Nokea
The basic function of the renal system includes filtration, secretion, reabsorption, and excretion. Which of the following substances is secreted by the nephrons and can be found in the filtrate that is eventually excreted?
- A. Amino Acids
- B. Creatinine
- C. Sodium
- D. Glucose
Correct Answer: B
Rationale: The correct answer is B: Creatinine. Creatinine is a waste product produced by muscle metabolism and is filtered by the nephrons in the kidneys. It is then secreted into the filtrate and eventually excreted in the urine. A: Amino Acids are reabsorbed by the nephrons, not secreted. C: Sodium is primarily reabsorbed by the nephrons to maintain electrolyte balance. D: Glucose is normally completely reabsorbed by the nephrons unless there is a medical condition such as diabetes where it may be found in the urine.
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When the nurse is interviewing a preadolescent girl, which opening question would be least threatening?
- A. Do you have any questions about growing up?
- B. What has your mother told you about growing up?
- C. When did you notice that your body was changing?
- D. I remember being very scared when I got my period. How do you think you'll feel?
Correct Answer: C
Rationale: Correct Answer: C - "When did you notice that your body was changing?"
Rationale:
1. This question is open-ended and focuses on the preadolescent girl's personal experience, allowing her to share information at her comfort level.
2. It avoids assumptions and allows the girl to express herself without feeling pressured.
3. By asking about her own observations, it encourages self-reflection and empowers her to communicate about her body changes.
Summary:
A - Option A might indirectly suggest that the girl should have questions about growing up, potentially creating pressure.
B - Option B assumes the mother's role as the primary source of information, potentially overlooking the girl's own experiences.
D - Option D introduces the tutor's personal experience, which may lead the girl to compare her feelings to the tutor's, potentially causing unnecessary anxiety.
The nurse is caring for a patient scheduled for renal should the nurse include?
- A. The need to be NPO for 12 hours prior to the test
- B. Relaxation techniques to apply during the test
- C. The need for conscious sedation prior to the test
- D. Administration of IV potassium chloride
Correct Answer: A
Rationale: The correct answer is A because being NPO for 12 hours prior to a renal biopsy helps prevent complications such as aspiration during sedation. Choice B is incorrect as relaxation techniques are not typically relevant for a renal biopsy. Choice C is incorrect as conscious sedation is not routinely required for a renal biopsy. Choice D is incorrect as IV potassium chloride administration is unrelated to renal biopsy preparation and may even be contraindicated.
Clavulanic acid is combined with amoxicillin because: *
- A. It inhibits beta lactamases that destroy amoxicillin
- B. It prevents renal excretion of amoxicillin
- C. It destroy bacteria that are not destroyed by amoxicillin
- D. It counteracts the adverse effects of amoxicillin
Correct Answer: A
Rationale: The correct answer is A because clavulanic acid acts as a beta-lactamase inhibitor, protecting amoxicillin from being destroyed by beta-lactamase enzymes produced by bacteria. This allows amoxicillin to effectively kill the bacteria. Choices B, C, and D are incorrect because clavulanic acid does not prevent renal excretion of amoxicillin, destroy bacteria directly, or counteract adverse effects of amoxicillin. The primary purpose of combining clavulanic acid with amoxicillin is to enhance amoxicillin's effectiveness by preventing its degradation by bacterial enzymes.
Which of the following best describes the mechanism of action of alprostadil?
- A. Alprostadil increases cAMP
- B. Alprostadil increases cGMP
- C. Alprostadil increases PDE-5
- D. Alprostadil blocks NO (nitric oxide)
Correct Answer: A
Rationale: Alprostadil is a prostaglandin E1 analog that works by binding to specific receptors and activating adenylate cyclase, leading to increased levels of cAMP. This results in smooth muscle relaxation and vasodilation. Therefore, choice A is correct. Choices B and C are incorrect as alprostadil does not directly affect cGMP levels or PDE-5 activity. Choice D is also incorrect as alprostadil does not block nitric oxide, but rather enhances its effects through the cAMP pathway.
A 75 year old man is suffering from benign prostatic hypertrophy and is being * treated with terazosin. Which of the following adverse reaction would be expected taking this drug?
- A. Erectile dysfunction
- B. Orthostatic hypotension
- C. GI distress
- D. Gynecomastia
Correct Answer: B
Rationale: The correct answer is B: Orthostatic hypotension. Terazosin is an alpha-1 blocker commonly used to treat BPH. It can cause vasodilation, leading to a drop in blood pressure, especially when standing up suddenly, resulting in orthostatic hypotension. This is because terazosin relaxes smooth muscle in blood vessels, causing dilation and blood pooling in the extremities. Erectile dysfunction (A) is not a common side effect of terazosin. GI distress (C) is less likely because terazosin does not directly affect the gastrointestinal system. Gynecomastia (D) is not a typical side effect of terazosin since it does not impact hormone levels significantly.